他为什么及如何来到这个城市是一个充满奋斗和成功的故事。

3．whether引导的主语从句，如果用了形式主语it，引导词whether可以换成if。如果whether从句在句首或后面有or not时，不能用if替换。

Whether genetically-modified food does us harm remains to be seen.

＝It remains to be seen whether/if genetically-modified food does us harm.

转基因食物对我们是否有害有待观察。

单句语法填空

1．Every year，whoever makes the most beautiful kite will win a prize in the Kite Festival.

(2017·北京)

2．It is often the case that anything is possible for those who hang on to hope.(2016·江苏)

3．Your support is important to our work.Whatever you can do helps.(2016·北京)

4．How we understand things has a lot to do with what we feel.(2015·北京)

5．Where Li Bai，a great Chinese poet，was born is known to the public，but some won't accept it.(2015·江苏)

6．Exactly when the potato was introduced into Europe is uncertain，but it was probably around 1565.(2014·大纲全国)

7．I think what impresses me about his painting is the colours he uses.(2014·天津)

Ⅰ.单句语法填空

1．That we are invited to the concert this evening is good news to us.

2．It doesn't matter whether you pay by cash or credit card in this store.

3．What you said at the meeting describes a bright future for the company.

4．It is necessary that he should learn about the whole matter.

5．Whoever sticks to his work will succeed sooner or later.

Ⅱ.单句改错(每小题仅有1处错误)

1. we will give up the plan isn't decided.

2. the boy is always late for school is clear to us all.