Everyone must go to bed early and get up early，or we won't be healthier and clever．

Is this true? Perhaps it is．The body must have __1__ sleep．Children of your age need __2__ sleep every day．If you don't go to bed early，you __3__ enough sleep，then you can’t think properly and can't do your work properly．You will not be clever．

Some people go to bed late and get up late．This is not good __4__ them．We must sleep at nine when it is dark．The dark help us __5__．When the daytime comes，we must get up．This is time for exercises．If you lack exercises，it becomes __6__．Exercises help a strong body．

Exercises help the blood（血液）flow around __7__ the body．This is very important．Blood takes food __8__ all parts of our body，the brain（大脑）needs blood．We think __9__ our brain．If we keep our body __10__ and take exercises，we can think better．

1．A．enough                   B．many                    C．some                     D．very

2．A．ten hours                    B．ten hours'              C．ten hour's               D．ten-hours'

3．A．will have                B．can have              C．won't have             D．have

4．A．to                         B．for                        C．with                             D．of

5．A．to sleep                   B．sleeping                 C．slept                    D．to sleeping

6．A．to weak                  B．strong                  C．weak                     D．healthy

7．A．outside                    B．out of                    C．into                       D．inside

8．A．to                           B．with                      C．out of                    D．from

9．A．of                           B．about                    C．with                             D．in

10．A．health                    B．healthing                C．healthy                   D．doing