1、So _____ in the darkness that he didn't dare to move ahead.
A、he was frightened B、was he frightened
C、frightened he was D、frightened was he
答案：D
分析：这里是倒装、（部分倒装） 有个小公式：So +adv/adj放句首，要倒装（这里是表示程度的）
例句：So diligently does he work that he often forgets to eat and sleep.

2、I don't know ________ makes her afraid of having her business discussed.
A、what it is about Mary that B、that is it about Mary what
C、what is it about Mary that D、that it is about Mary that
答案： A
分析：这个句子融合了宾从以及对Mary这个的强调、省略下来的主干就是 I don't know what makes her afraid of having her business discussed.完整的句子就是 I don't know （that）what （it is ）about Mary （that）makes her afraid of having her business discussed.
补充：what在这里是作宾语从句里的主语

3、-Was it the new school master who walked by?-______
A、It must be that B、It must have been him
C、He must be D、This must have been
答案：B
分析：must have been是情态动词的用法之一，用来表示对过去所发生的事情的一种肯定的推断：“刚才走过去的那位是新校长吗？一定是的。”因为主句中的谓语动词用的是过去时，因此可以判断是“对过去所发生的事情的一种肯定的推断”所以只有B和D符合要求。表示上文所提到的内容不能用this来代替，但是可以用it.

4、So carefully ______ that he almost killed himself.
A、he drives B、he drove
C、does he drive D、did he drive
答案：D
分析：像第一题一样，部分倒装，此题关键是killed，可知是过去式。

5、It was in the factory _____produced TV sets _____ our friends was murdered.
A、which；which B、that;which
C、that、that D、where；that
答案：C
分析：这个句子掺杂了定从与强调句第一空是定语从句，factory是先行词，that是在这个定从里做主语、第二空与开头的It was构成强调句

6、We haven't settled the question of_____ it is necessary for him to study adroad.A、whether B、 if
C、where D、 that
答案：A
分析：whether...or not 固定词组of 等介词后用whether,不用if

7、The lecture mainly deals with the trouble young children have _____ right from wrong.
A、distinguished B、distinguishing
C、to distinguish D、to be distinguished
答案：B
分析：这里涉及一个词组 have trouble （ in ) doing sth