Why we decided to put off the football match was that the weather was too bad.我们之所以决定推迟这场足球赛是因为天气太糟糕了。

(2)在引导表语从句时，whether不能用if替换。

His first question was whether Mr Smith had arrived.他的第一个问题是史密斯先生到了没有。

单句语法填空

1．The gold medal will be awarded to whoever wins the first place in the bicycle race.(2018·天津)

2．By boat is the only way to get here，which is how we arrived.(2018·江苏)

3．Jane moved aimlessly down the tree­lined street，not knowing where she was heading.

(2017·北京)

4．We choose this hotel because the price for a night here is down to 20，half of what it used to charge.(2017·江苏)

5．She asked me whether I had returned the books to the library，and I admitted that I hadn't.(2017·天津)

6．The most pleasant thing of the rainy season is that one can be entirely free from dust.

(2016·北京)

7．A ship in harbor is safe，but that's not what ships are built for.(2015·安徽)

8．We must find out when Karl is coming，so we can book a room for him.(2015·重庆)

9．I truly believe that beauty comes from within.(2015·北京)

10．If you swim in a river or lake，be sure to investigate what is below the water surface.Often there are rocks or branches hidden in the water.(2015·浙江)

Ⅰ.选用适当的连接词填空

1．The question discussed at the meeting was whether it was worth trying.

2．We think that it's necessary to talk with him again.

3．Do you remember when/how/why he came here?

4．All this was over twenty years ago，but it is as if it were only yesterday.

5．I'm wondering why you are always late for class.

6．I am not sure whether he is willing to help me.

7．My parents are very kind to me and always let me do what I think I should do.