Ex. 4. Find and correct five sentences that are wrong. 1. Lots of people waste money without noticing. 2. It has caused a great deal trouble. 3. There aren't lots of people here as I thought there would be. 4. How much time have we got left? 5. A great deal of time has been wasted. 6. Plenty time has passed. 7. I hope it's not too much of trouble. 8. There has been a lot of interest. 9. There hasn't been many response. 10. A large quantity of food is thrown away every day.

Неправильные предложения: 2, 3, 6, 7, 9.

2. It has caused a great deal of trouble.
   После выражения a great deal перед неисчисляемым существительным нужен предлог of.

3. There aren't as many people here as I thought there would be.
   В сравнительной конструкции используется as many people as, а не lots of people as.

4. Plenty of time has passed.
   После plenty необходим предлог of: plenty of time.

5. I hope it's not too much trouble.
   С неисчисляемым словом trouble обычно говорят too much trouble, без of.

6. There haven't been many responses.
   После many существительное должно стоять во множественном числе: responses. Поэтому также используется haven’t been, а не hasn’t been.

Остальные предложения составлены правильно.