Grammar
Revision
-ing形式作主语和宾语的用法  Translate the following sentences into Chinese.    1. Talking to him is talking to a wall.      对他说话等于对牛弹琴。    2. S
  3. Walking is my sole exercise.    散步是我唯一的运动。  4. Talking mends no holes.   （谚）空谈无济于事。  5. I suggest bringing