1．Tom did his homework yesterday．(变为否定句)　

　Tom______　 _______his homework yesterday．

10．We had fun_____(watch)the videos last night．

9．You should_____(take)care of yourselves．

8．____your brother____(study) for the text yesterday?

7．Look! Mike_____(help)an old woman．

6．Tom is much_____(quiet)than Bill．

5．We_____(enjoy)ourselves in the park two days ago．

4．Stop t____(talk)loudly．They are having a meeting．

3．You need_____(wear)warm clothes in winter．

2．How many____(tooth)does the baby have?