1 . About 2,296 people were chosen to ________ (出席) The 20th National Congress of the Communist Party of China.

2 . 计算（3x²y）²的结果是（       ）

A．6x2y2

B．9x2y2

C．9x4y2

D．x4y2

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

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

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

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

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

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

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

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