7. — ________ I borrow these books?
— Sorry, only the books over there can be borrowed.
A. Must B. Would C. May D. Need
答案选C. May
我能借这些书吗?
8. It is difficult for us to learn a lesson in life ________ we’ve actually had that lesson.
A. when B. after C. since D. until
答案选D. until
【解析】后面从句用的是完成体,强调某一动作已经完成,主句是一般现在时指的是一般/客观状况,所以从时间顺序上说,从句在前,主句在后.所以意思大致应该是“在我们已经得到（某个）教训之前,我们很难在生活中汲取教训.
9. — What did Mr. Smith call me for? — He wanted to know ________ this weekend.
A. who youwould go hiking B. when will you go hiking with him
C. that you will go hiking D. if you would go hiking with him
答案选D. if you would go hiking with him
你是否想和他去徒步旅行