231] ______ a good insulator(绝缘体) , rubber is often used in cables.

[译文] 由于是较好的绝缘体，橡胶常用于电缆。

　 A. Having been 　 B. To be

　 C. Be 　 D. Being

[答案及简析] D。 现在分词短语表原因，状态等；不定时表示将来，目的。

230] We found Mary’s brother to have _____ more story books than Ann’s.

[译文] 我们发现Mary哥哥的故事书比Ann的多得多。

　 A. much 　 B. too much

　 C. by far 　 D. far

[答案及简析] D。 much只能修饰不可数名词；故选far。

229] I felt ______ tired, but he didn’t stop ______.

[译文] 我感到相当疲倦，然而他却没有停止学习。

　 A. little, to read 　 B. rather, studying

　 C. fairly, studying 　 D. few, to study

[答案及简析] B。 rather表示"相当"一般用于贬义；stop后面只能接动名词表示"停止做什么"。

228] All of us need ______.

[译文] 我们都需要感到必要和受到别人的尊重。

　 A. to feel needed and admired 　 B. feeling needed and admired

　 C. to feel being needed and admired 　 D. to feel needing and admiring

[答案及简析] A。 need作实意动词后面的跟不定式作宾语。

227] If you _____ the medicine you _____ better now.

[译文] 如果你吃了这药，现在会感觉得好些。

　 A. took ; would feel 　 B. had taken ; felt

　 C. had taken ; would feel 　 D. took ;would have felt

[答案及简析] C。 错综复杂条件状语从句中的虚拟语气问题。从句与主句的时态各自判断。

226] ____ knocked down and hurt worried her friends.

[译文] Kate被撞倒和受伤使她的朋友担心。

　 A. Kate’s being 　 B. Kate was

　 C. Kate being 　 D. Kate had been

[答案及简析] A。 动名词的复合结构作主语应该是规范的形式。

225] I’d rather he ______ tomorrow afternoon.

[译文] 我宁愿他明天下午来。

　 A. will come 　 B. comes

　 C. coming 　 D. came

[答案及简析] D。 would rather后面的宾语从句用过去时态表示虚拟语气。注意，该句型中主句中没有谓语动词。

224] Do you mind ______ alone at home?

[译文] 把Jane独自留在家里，你不介意吗？

　 A. Jane leaving 　 B. Jane having left

　 C. Jane’s being left 　 D. Jane to be left

[答案及简析] C。 mind后面一般跟动名词，此句是动名词的复合结构作宾语。

223] ______ unless I call you.

[译文] 我不叫你就不要进来。

　 A. Please come 　 B. Not come in

　 C. Don’t come in 　 D. Come in

[答案及简析] C。 unless = if…not 除非，如果不

222] _______ about the universe up till now.

[译文] 直到现在他对宇宙仍然知道甚少。

　 A. So little had me known 　 B. Only a little do we know

　 C. Very little have we known 　 D. Little shall we know

[答案及简析] C。 little等否定词在句首，句子要部分倒装。