4. 我们很累但是很开心。(but)

3. 我们沿着小路走并且休息了一会。(walk down the path,have a rest)

2. 到达那里后，我们立刻开始爬山了。(start to… at once)

1. 上周末，我和我的同班同学去郊游了。(go... with …)

5. He was glad that so many people        (help) him.

4. They thought that they could        (hike) to the top of the mountain.

3. I hear that he        (swim) in the sea yesterday.

2. My father said that he        (will) buy a new computer.

1. We are sure that he        (go) to school tomorrow.

(   ) 5. —I don’t know        .

—Because he has to look after his mother.

   A. why he is leaving

   B. why is he leaving

   C. whether he is leaving

   D. whether is he leaving