He suddenly remembered that.

4.  将下面每组中的两个句子合并，将其中一个改为宾语从句，并且用it作形式宾语。
1) I was far more intelligent than he was.
I always took that for granted.
2) You were unable to attend our meeting.
 We all thought that was a pity.
3) You should mind your manners.
 We consider that is important.
4) He was too ill to go on working.
 He didn't want that to be known.
5) Every one of you should finish your homework on time.
 I regard that as important.
6) His father would come to his help if he got into trouble.
 He took that for granted.
7) He might change his mind at the last minute.
 We thought that was highly probable.
8) The train will be delayed by the dense fog.
 I think that is likely.
9) You should stop smoking.
 The doctor thinks that is advisable.

5.  用 “what” 从句将下列句子补充完整。
1) Could you show me ______ (you, write)?
2) This is ________(we, should always, keep in mind).
3) (they, see) _______ in China made a deep impression on them.
4) We must not put off till tomorrow ______ (we, can, do , today).

6. 将下面每组中的两个句子合并，将其中一个改为同位语从句。
1) He is growing old.
Nothing could hide the fact.
2) He works hard.
The fact does not necessarily mean that he is a competent leader.
3) I have a complacent feeling.
I feel that I’m highly intelligent.
4) He explained that he didn’t see the notice.
The explanation is unsatisfactory.
5) He holds that there is no advantage in introducing the new method.
Most of us don’t agree with his view.
6) He won the first gold medal at the 23rd Olympic Games.
The news soon spread throughout the country.
7) He has suggested that intelligence is a relative matter.
His suggestion is not universally accepted.
8) I moved that the vote be postponed.
He seconded my motion.
9) He feared that he might not be able to finish the work.
The fear disturbed him greatly.
10) We expressed a hope.
That hope was that Mr. and Mrs. Morrison would come and visit China again.
11) I’ve come from Mr. Lin with a message.
It says that he won’t be able to see you this afternoon.
12) Suzy is the right person for the job.
There can be no doubt about it.
 定语从句
在复合句中修饰名词或代词的从句是定语从句。被定语从句修饰的词叫先行词。定语从句必须放在先行词的后面。定语从句一般由关系代词that, which, who, whom, whose和关系副词when, where, why引出。
关系代词和关系副词有两个作用：1、把主句和从句连接起来；2、在从句中作一个成分。which, that, who在从句中作主语或宾语；whom作宾语；whose作定语。when, where, why在从句中作状语。
关系代词that, which, who, whom如果在从句中作宾语，也可以省略。
另外，如果which或whom在定语从句中原为介词的宾语，则这个介词可以提到从句前，构成介词+which或whom引出的定语从句。
定语从句根据与先行词的密切程度可分为限制性定语从句和非限制性定语从句。限制性定语从句与先行词关系密切，从句是整个句子不可缺少的部分，去掉之后句子的意思就不完整，不明确，从句与主句之间不用逗号隔开。非限制性定语从句与先行词的关系比较松散，从句只是对先行词的附加说明，去掉之后句子的意思仍然很清楚，从句与主句之间常用逗号隔开。