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问题: 请帮忙,谢谢!

1. ---He looks unhappy.


---Yes, but he can’t say what it is __ is bothering him.


a. as b. what c. that d. which


2. They shouted for help ___ .


a. as loudly as they can b. as loudly as possible c. as loudly as they could

3. Those who were left alone in the cave know better than the others __ sounds bats in the dark made.


a. that frightening b. which frightening c. what frightening

请回答为什么?

解答:

1. ---He looks unhappy.


---Yes, but he can’t say what it is _c. that _ is bothering him.


a. as b. what c. that d. which 强调句型,强调what

2. They shouted for help __c. as loudly as they could

_ .


a. as loudly as they can b. as loudly as possible c. as loudly as they could选c, 主语是they, 如选b 是as loudly (it was )的省略,主语不一致.

3. Those who were left alone in the cave know better than the others __ sounds bats in the dark made.


a. that frightening b. which frightening c. what frightening

选c,重先调整句子成为:Those who were left alone in the cave know what frightening sounds bats made in the dark better than the others . what引导的宾语从句,sounds 后是过去分词短语做后置定语.what 修饰frightening sounds.