1.         Sorry, I have kept you________(wait) so long.

2.         I have finished ______(read) the newspapers. You can take them away.

3.         If it _______ (not rain) tomorrow, I will go swimming.

4.         Be quiet! Our teacher ________(talk) to us now.

5.         ______(not get) on the bus before the bus ______(stop).

6.         The Kings often _____(change)their diet because they want to eat healthy meals.

7.         You should say “Thank you” when you _______(give) something.

8.         I finished my homework before the TV program_____ (end).

9.         After the meeting is over, we _______(have) a discussion.

10.     By the end of last term, We ________ (learn) 15,000 English words.