20. Probably, I … my friends at this time. a) shall have visited b) shall be visiting c) have visited 21. Now I... industry cooperates with the natural environment. a) shall be illustrating b) would be illustrating c) will have illustrated 22. We … for you! a) will be waiting b) are waiting c) have been waiting 23. We … for them at five o’clock tomorrow. We are sure they … in time. a) wait, will be coming b) 'll be waiting, 'll come c) are waiting, come 24. At three p. m. tomorrow we … our French lesson. a) will take b) will be taking c) take 25. Who is that man? Why … at us? a) he is looking b) is he looking с) does he look 26. Hello, Kate! I hear you … English now. Why? a) shall be learning b) learn c) are learning 27. Jack... very nice to me at the moment. I wonder why. a) is being b) is c) is to be 28. Why isn't Sarah at work today? … ill? a) Does she to be b) Is she c) Is she being 29. He … the report at that moment. a) was writing b) would be writing c) wrote 30. When you come to see me tomorrow I … in the garden. a) would be working b) shall be working c) will have been working 31. Honesty is... policy. a) the best b) better c) more better 32. Of two evils choose the... a) less b) little c) least 33. What's the ... news of today? a) later b) latest c) last 34. If you require... information or assistance, ask at your local station. a) further; b) farther c) furthest 35. Actions speak... than words. a) more louder b) the loudest c) louder 36. Hotels are becoming... nowadays. a) more expensive b) the most expensive c) expensiver 37. The damage to the car could be..., than we expected. a) bad b) worse c) the worse 38. That was... case in his practice. a) the least difficult b) the less difficult c) the less difficulter 39. The sea is... unknown part of our world. a) the most large b) the largest c) the most largest 40. Why does he always come to see me at … possible moment? a) bad b) worse c) the worst 41. … you have, … you want. a) The more, the more b) The most, the most c) Much, much 42. I don't know … many people … you do. a) as, as b) as, so c) so, so 43. She... have time to go out. a) often doesn’t b) not often does c) doesn’t often 44. This dictionary is … that one. a) as good as b) as well as c) good than 45. We danced … to the music and had a … time. a) happy, wonderfully b) happily, wonderful c) happily, wonderfully 46. The guests all gave Edith … presents and Edith thanked them … . a) nice, sincerely b) nicely, sincerely c) nice, sincere 47. He likes … to sing Italian songs to the guitar. a) much many b) very many c) very much 48. A: Mr Jones shouted … today. B: I know. He was in a very … mood. a) angry, badly b) angrily, bad c) angrily, badly 49. A: Have you finished that puzzle already? B: Yes, it was really … . a) easy b) easily c) the easiest 50. He looked at me … and told me never to lie to him again. a) serious b) seriously c) more serious

b) shall be visiting
Фраза at this time указывает на действие в процессе в определённый момент в будущем → нужен Future Continuous: I shall be visiting my friends at this time.

a) shall be illustrating
Now + смысл “я сейчас показываю/иллюстрирую (на примере)” → нужен процесс “прямо сейчас”. Из вариантов только shall be illustrating даёт форму Continuous (хотя в живом английском чаще сказали бы I am illustrating).

b) are waiting
We are waiting for you! — обычное “мы тебя ждём (сейчас)”. will be waiting звучит как план/ситуация в будущем, have been waiting подчёркивает длительность ожидания до настоящего (нужно бы “for two hours” и т. п.).

b) 'll be waiting, 'll come
at five o’clock tomorrow → процесс в конкретный момент будущего: we’ll be waiting.
We are sure they … in time → обычное будущее факт/результат: they’ll come.

b) will be taking
At three p.m. tomorrow — действие будет идти в этот момент → Future Continuous: we will be taking our French lesson.

b) is he looking
Why … at us? — “почему он (прямо сейчас) смотрит?” → Present Continuous в вопросе: Why is he looking at us?
(Вариант does he look был бы про привычку/характерную манеру.)

c) are learning
now + “в данный период” → Present Continuous: you are learning English now.

a) is being
at the moment + временное поведение → is being nice (“ведёт себя мило/приятно сейчас”).
is nice — постоянная характеристика, не подходит по смыслу.

b) Is she
Вопрос про состояние: Is she ill? — “Она больна?”
Is she being ill? звучит неправильно: Continuous тут не используют для “болеть” как состояния.

a) was writing
at that moment → процесс в прошлом в конкретный момент → Past Continuous: He was writing the report at that moment.

b) shall be working
When you come … tomorrow → в момент твоего прихода я буду в процессе → Future Continuous: I shall be working in the garden.
(will have been working — это “уже какое-то время к тому моменту”, нужна была бы длительность: for two hours.)

a) the best
Устойчивое выражение: Honesty is the best policy.

a) less
Устойчиво: Of two evils choose the less (evil).
least — когда выбор из трёх и более.

b) latest
the latest news = “самые свежие новости”.

a) further
further information — устойчиво, значит “дополнительная информация”.
farther — обычно про физическое расстояние.

c) louder
Сравнение: Actions speak louder than words.
Варианты more louder и the loudest грамматически/смыслово не подходят.

a) more expensive
Многосложное прилагательное → сравнительная степень через more: more expensive.

b) worse
could be worse than we expected — сравнительная степень “плохой”: worse.

a) the least difficult
the least difficult case — “самый несложный”. Остальные варианты ошибочные.

b) the largest
the largest unknown part — правильная превосходная степень: largest.
the most large / the most largest — неверно.

c) the worst
at the worst possible moment — устойчиво: “в самый неподходящий момент”.

a) The more, the more
Конструкция корреляции: The more you have, the more you want.

a) as, as
Сравнение равенства: as many people as you do (“так же много людей, как и ты”).

c) doesn’t often
Обычно наречие частоты ставят перед смысловым глаголом, но после do/does:
She doesn’t often have time to go out.

a) as good as
Сравнение: This dictionary is as good as that one.
as well as — “а также/так же как” в другом значении, good than — неверно.

b) happily, wonderful
We danced happily — нужен наречный способ действия.
had a wonderful time — нужен прилагательное к time.

a) nice, sincerely
nice presents — прилагательное к presents.
thanked them sincerely — наречие к thanked.

c) very much
He likes very much to sing… / He very much likes singing… — “очень любит”.
very many относится к исчисляемым существительным во множественном числе, тут не подходит.

b) angrily, bad
shouted angrily — наречие.
in a very bad mood — прилагательное к mood.

Вопрос обрывается на “it was rea…”, вариантов ответа нет, поэтому выбрать правильный вариант по 49-му пункту невозможно.