1 . 用适当的连接词填空
1. ________ we will hold a party in the open air tomorrow depends on the weather.
2. ________ troubles me most is ________ I don't know how to calm the sick old man.
3. You say that everyone should be equal, and this is ________ I agree.
4. I have no idea ________ animals have the same senses as humans.
5. I am very interested in ________ he has improved his pronunciation in such a short time.

2 . 单句语法填空
1. The question remains __________ we can win the majority of the people.
2. We must make it clear __________ anyone who breaks the law will be punished.
3. You should know __________ you’re going before you plan the best way of getting there.
4. Mary shut the door heavily and burst into tears. No one in the office knew __________ she was so angry.
5. As a graduate, he doesn’t know __________ it needs to start a business here.
6. What the doctors really doubt is __________ my mother will recover from the serious disease.
7. Pointing to the building, my brother said, “This is __________ I worked two years ago.”
8. Sarah hopes to become a friend of __________ shares common interests with her.

3 . 语法专练（用表语从句和宾语从句完成句子）
1. 城市在哪儿落脚通常都是有充分的理由的，比如靠近港口或河流。
Cities usually have a good reason for ______.
2. 她问我是否已经把书还给图书馆了，我承认说我还没有。
She asked me ______, and I admitted that I hadn’t.
3. Jane沿着绿树成荫的街道漫无目的地走着，不知道去往何方。
Jane moved aimlessly down the tree-lined street, not knowing ______.
4. 港口里的船是安全的，但是那不是建造船的目的。
A ship in harbor is safe, but that’s not ______.
5. 我真的相信美丽来自内心。
I truly believe ______.
6. 无论谁获得自行车比赛第一名，金牌都将授予他。
The gold medal will be awarded to ______.
7. 他的麻烦是如何得到他所需要的帮助。
His trouble is ______.
8. 乘船是到达这里唯一的途径，这就是我们如何到达的。
By boat is the only way to get here, and ______.
9. 他没有参加昨天的会议，那是因为他去海南出差了。
He was absent from the meeting yesterday. That was ______.
10. 我们选择这家宾馆，因为这儿一晚的价格下降到20美元，是它以前收取价格的一半。
We choose this hotel because the price for a night here is down to $20, half of ______.

4 . 用适当的连接词填空
1. She asked me _____________ I had returned the books to the library,and I admitted that I hadn’t.
2. The most pleasant thing of the rainy season is ____________ one can be entirely free from dust.
3. A ship in harbor is safe，but that’s not ________ ships are built for.
4. Dr.Black comes from either Oxford or Cambridge.I can’t remember ________.
5. —I drove to Zhuhai for the air show last week.
—Is that ________ you had a few days off？
6. I had neither a computer nor newspaper.That’s ________ I don’t know the latest news.
7. He will talk to us about ________ he saw in the U. S.
8. We’re worried about ________ he is safe or not.
9. Do you know ________ shirt it is？
10. The truth is ________ she was the very person we are looking for.