1 . There were no computer rooms at that time. (改为同义句)
There ________ not ________ computer rooms at that time.

2 . It’s difficult for me ________ (develop) a good habit.

3 . —The manager has decided to give us an extra day's holiday for our hard work.
—You can't be ______. It's impossible.

4 . I can’t tell you whether it’s a good book or not ________（没有）reading it.

5 . My uncle always ________ ________ (拍照) of birds.

6 . —How many students are there in the classroom?
—I think there are twenty at ______ (little).

7 . Lisa w______ nearly 75kg now because she eats too much junk food.

8 . We all love China very much, because it is a ________(伟大的) country.

9 . It is difficult to i________ how to live in a place without mobile (可移动的) phones or cars.

10 . 在课堂上犯错误是常见的，所以要勇敢地面对它。
Making mistakes ________ ________ is common, so be brave to face it.