1. They always walk to school, but sometimes they go to school by bus.

A. often             B. at times        C. some time

2. How many hours do you sleep every night?

A. How much     B. How long       C. How often

3. A lot of vegetables help you to keep healthy.

A. be good.       B. keep in good healthy.    C. keep in good health.

4. --- What’s  wrong with you,  young man?   --- I felt a little cold.

   A. problem           B. question           C. the matter