1 . _________ quiet in the library, please. (       )

A．Kept

B．Keeping

C．Keep

2 . Please _____ (保持) your desk _____ (干净的).

3 . 用所给单词的适当形式填空。
1. Give me two_________(box)of milk,please.
2. Please do your homework_________(careful).
3. The ant works for__________(he)and his queen only.
4. Old MacDonald is a _________(farm).He________(get) his crops in by hand in the past.
5. Once upon a time, there_________(be) a dancer_________(call)Ballet.
6. You should________(keep) quiet.Your baby sister_________(sleep).
7. Sally is 168 centimetres tall.Peter is 170 centimetres tall.Peter is _________(tall).