10. This magazine comes _____ once a month.

9. The trees turn green and flowers come _____.

8. How long is it since the electronic computer came _____ use?

7. Lei Feng came _____ a poor peasant's family.

6. The airplane came _____ in that field.

5. It is impossible for a dead animal to come _____.

4. Now, to come _____ to what I was saying a moment ago.

3. I'll help you too if any beast comes _____ you.

2. Come _____, try it again.

1. I came _____ him first in Beijing.