問題詳情：
用所給詞的適當形式填空
1. (actual), there are only 18 seats on the bus.
2. Houston is a (south)city of the United States.
3. If you work hard, you can enjoy (successful)some day.
4. While Tom (play)computer games, he heard a strange noise.
5. Have you ever (be)to Beijing?
【回答】
1. Actually 2. southern 3. success 4. was playing 5. been
知識點：構詞法
題型：完成句子
