根據(jù)上下文意思，選擇合適的單詞補(bǔ)全短文，每詞只能使用一次。
A.strong B.clever C.useful D.sleep E.well
"Early to bed，early to get up."Kids should have ten hours'（小時(shí)）（1）

D

D

every night，or（否則） they can't do their work very（2）

E

E

.They will not be（3）

B

B

.Exercise is（4）

C

C

.Kids should do exercise every day.Walking，jogging，swimming and playing ball games are all exercise.Exercise makes the body（5）

A

A

.