单项选择，从A、B、C、D中选出最佳的答案。
1）Sally and Kim are _______.They are in Grade One.
A.child B. students C. classmate D. friend
2）We need to find some _______ people to lift this heavy bag.
A.fast B. old C. strong D. weak
3）These socks are not ________.
A.my B. me C. I D. mine
4）The cat is running away. Quick, ________ it.
A.catch B. see C. do D. keep
5） _________ something warm. It’s cold today.
B.Take off B. Take on C. Put on D. Put off