1. Do you know what time _________?

A. the train leave      B. does the train leave

C. will the train leave    D. the train leaves

答案： D

解析： 宾语从句用陈述语序，从句是客观事实，用一般现在时。

2.  I don't know _________. Can you tell me, please

A. how the two players are old       B. how old are the two players

C. the two players are how old       D. how old the two players are

答案： D

解析：宾语从句用陈述语序。

3. I am sure _______ you said is true.

A. what    B. that    C. which    D. who 

答案： A

解析： 根据句意应用what , 做said 的内容， 你所说的话。应选A.

4.The small children don't know _________.

A. what is their stockings in       B. what is in their stockings

C. where is their stockings in     D. what in their stockings

答案：B

解析： 宾语从句用陈述语序，what在从句中做主语。

5. I can't understand _____.

A. what does Christmas mean       B. what Christmas does mean

C. what mean Christmas does       D. what Christmas means

答案：  D

解析：宾语从句用陈述语序，what在从句中做宾语。

6.I don’t know _____ he will be back home.

A. who 　B. what 　C. when 　D. where

答案：C

解析：因为后面的从句是说他将回家，所以前面应该是我不知道他什么时间回家。

【小知识】简化宾语从句常用方法
同学们常会遇到把含有宾语从句的复合句转化为简单句，使其与原句意思相同（或相近）的试题。下面就介绍几种常用的简化宾语从句的方法：

方法一：当主句谓语动词是hope， decide， wish， choose， agree， promise等，且宾语从句的主语与主句主语一致时，宾语从句可简化为不定式结构。例如：
Li Ming hopes he will be back very soon. →Li Ming hopes to be back very soon.
We decided that we would help him. →We decided to help him.

方法二：当主句谓语动词是know， learn， remember， forget， tell等动词，且主句主语与从句主语一致时，宾语从句可简化为“疑问词+不定式”结构。例如：
She has forgotten how she can open the window. →She has forgotten how to open the window.
注：当主句谓语动词是tell， ask， show， teach等动词，且后带双宾语，从句主语和间接宾语一致时，宾语从句可简化为“疑问词+不定式”结构。例如：
Could you tell me how I can get to the station？ →Could you tell me how to get to the station？

方法三：当主句的谓语动词是order（命令），require（需要）等时，如果主句和从句的主语不一致，宾语从句可简化为“名词（代词）+不定式”结构。例如：
The headmaster ordered that we should start at once. → The headmaster ordered us to start at once.