a. “such”, “so”
1. The day was ……… exciting!
2. It’s ………… an original idea!
3. The letter is ……… informative!
4. It’s ……… good weather today!
5. The dress is ……… smart.
6. I can’t afford ……… an expensive coat.
7. His health is ……… poor.
8. You can’t talk in …….. a way.
9. Her taste is ………. good.
10. Helen has ……… a good sense of humour.

b. «must», «to have to», «to be to»
1. I missed my bus, and I ... get there on foot.
2. You ... always revise grammar rules.
3. Mr. Smith ... to speak with his students at 10 a.m.
4. I . . . learn all the words yesterday not to get bad marks.
5. You . . . do well at school.
6. Concerning the timetable the train . . . arrive at 9.45 a.m.

a. such / so

1. The day was so exciting!

2. It’s such an original idea!

3. The letter is so informative!

4. It’s such good weather today!

5. The dress is so smart.

6. I can’t afford such an expensive coat.

7. His health is so poor.

8. You can’t talk in such a way.

9. Her taste is so good.

10. Helen has such a good sense of humour.

Правило:

• so употребляется перед прилагательным или наречием: so exciting, so informative, so smart.

• such употребляется перед существительным, часто с прилагательным: such an idea, such good weather, such a coat.

b. must / to have to / to be to

1. I missed my bus, and I had to get there on foot.

2. You must always revise grammar rules.

3. Mr. Smith is to speak with his students at 10 a.m.

4. I had to learn all the words yesterday not to get bad marks.

5. You must do well at school.

6. Concerning the timetable the train is to arrive at 9.45 a.m.

Объяснение:

• must выражает необходимость, приказ, совет или требование говорящего: You must revise grammar rules.

• have to означает вынужденную необходимость из-за обстоятельств. В прошедшем времени используется форма had to, так как у must нет обычной формы прошедшего времени: I had to get there on foot.

• be to используется для запланированных, официально назначенных действий, расписаний или инструкций: The train is to arrive at 9.45 a.m.