是有幸遇到你，我真不知（指现在不知）我会做出什么蠢事来”。
9. If only he _______ quietly as the doctor instructed, he would not suffer so much now.
A. lies B. lay
C. had lain D. should lie 选 C. if only 意为“要是……就好了”，其后的句子谓语要用虚拟语气，同时根据 as the doctor instructed 中的过去时态可知从句是与过去事实相反
10. Without the air to hold some of the sun’s heat, the earth at night ____ for us to live.
A. would be freezing cold B. will be freezing coldly C. would be frozen cold D. can freeze coldly
选 A.without 引出的介词短语为一个与现在事实相反的含蓄条件句 12. “It looks as if he were drunk.” “So it does. _____.” A. He’d better give up drinking
B. He shouldn’t have drunk so much C. Health is more important than drink D. I wonder why he is always doing so
关键信息是It looks as if he were drunk 中的虚拟语气，句子既然用了虚拟语气，也就是说，“他喝醉了”不是事实，只是他的言行好像是醉了，所以此题的最佳答案是D.
13. “Mary looks hot and dry” “So _____ you if you had so high a fever.” A. do B. are C. will D. would
由于空格后的 if 条件状语从句的谓语用的是虚拟语气（这是很重要的信息），所以主句要用 would 而不用 will，即答案应选D.
21.________ fired, your health care and other benefits will not be immediately cut off.
A. Would you be B. Should you be C. Could you be D. Might you be
should除了最基本的意思外还有两个意思就是“居然”和“万一” ：万一你被解雇，给你的医疗救助和其它方面的福利也不会被取消
23.—Excuse me. But I want to use your computer to type a report. —You _____have my computer if you don’t take care of it . A. shan’t B. might not C. needn’t D. shouldn’t shall此处表示“警告”
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