7. I heard somebody calling _____ to me from downstairs.
8. Call me _____ tomorrow; my number is 536291.
9. Your letter calls _____ the days when we worked together fifteen years ago.
1. call at 访问，拜访某地
2. call for 请求，要求
3. call for 去接某人，接走某人
4. call in 召请，请来
