4. 我們很累但是很開心。(but)

3. 我們沿著小路走并且休息了一會。(walk down the path,have a rest)

2. 到達(dá)那里后，我們立刻開始爬山了。(start to… at once)

1. 上周末，我和我的同班同學(xué)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