3．Mary has two keys．(改为否定句)

　 Mary _______ __________ two keys．

2．They are English books．(改为单数形式)

　　 ____________ ___________ English book．

按要求变换下列句型，每空只填一词。

1．Are you Peter?(作否定回答)

　　_______,______ not．

15．She ________(not have)a brother．

14．We can ________(play)basketball．

13．He _______(have)a book．

12．You and I _______(be)good friends

11．Are ____________ (that)his rulers?

10．What's your __________ (one)name?　

9．I have two_______(watch)．