107.　　 I had some trouble _______ (find) your house because I lost the address.

106.　　 My friend’s homework ______ (be) cleaner and tidier than _______ (I).

105.　　 There is a lot of work　　　 (do).

104.　　 Do you know when __________ (have) a P.E test ?

103.　　 The boy is so clever that he can ____ (easy) tell some ____ (different) between the photos.

102.　　 It’s necessary for us _________ (listen) _________ (careful) in class .

101.　　 The Smiths ______ (marry) 20 years ago . They _________ (marry) for 20 years.

100.　　 The ________ (careful) you are , ________ (few) mistakes you make .

99.　　 Should the students 　　　(allow)to bring mobile phones to school?

98.　　 A __________(science) teaching method is very ___________(importance) for us.