7*The sentence needs _______once more.
A. explained
B. explaining
C. being explained
D. to explain
答案是B，explain 解释
8* You look very tired. You ____ to bed too late last night.
A. must go
B.must have gone
C. could go
D. didn’t go
答案是B
9*-- I will come to attend your lecture at 10:00 tomorrow.
--- I’m sorry, by then my lecture will have ended and I ______ my guests in my office.
A. is being met
B. will meet
C. will be meeting
D. will have met
答案是C，lecture 演讲，到那时，演讲已经结束了，我正在会见客人
10* The police _______ determined to bring back the missing boy when his family _____ almost given up all hope.
A. is; has
B. are; have
C. are; has
D. is; have
答案是B，两个词都是复数police 警察们，本身表复数，前面不能加a，后面不能加s。family 家庭，单数，family 家人，亲人，复数。 the +形容词可以表示一类人，也是复数。
11* Do I have to take this medicine? It ________ so terrible.
A.tastes
B.is tasting
C.is tasted
D.has tasted
答案是A，感官动词没有被动语态
12*A friend of mine returned to his house after a holiday only to find it ________.
A.to be broken
B.had broken into
C.was broken
D.had been broken into
答案是D
13* Mr. Taylor _____ her very well. They were introduced by an old friend ten years ago.
A. knows
B. knew
C. had known
D. is knowing
答案是A，他对她很了解。他们十年前被介绍认识的。回答问题，了解是什么时候的事儿？现在。我跟王老师很熟。我三年前就上过他的课。熟是什么时候的事儿？现在。
14*---May I pick a flower in the garden ?
— ______.
A. No, you needn’t
B. Not, please
C. No, you mustn’t
D. No, you won’t
答案是C
15* The manager or his assistant _____ planning to go.
A. were
B. are
C. was
D. be
答案是C，就近原则，assistant 助手
16*All but one _____ here just now.
A.is
B.was
C.has been
D.were
答案是D，just now 刚刚，刚才，表过去，就远原则，all在这里指所有人，复数
17*--I heard they went skiing in the mountains last winter.
--It ____ true because there was little snow there.
A. may not be
B. won’t be
C. couldn’t be
D. mustn’t be
答案是C，it couldn't be true. 不可能是真的
18* ---How long ____ each other before they ______ married?
----For about a year.
A.have they known; get
B.did they know; get
C.do they know; are going to get
D.had they known; got
答案是D
19* The number of people invited ______ fifty, but a number of them ____ absent for different reasons.
A.were , was
B.was , was
C.was , were
D.were , were
答案是C，absent 缺席的，the number of 单数，a number of 复数。
2021.3.29
1* Sorry, I am too busy now. If I ____ time, I would certainly go for an outing with you.
A. have had
B. had had
C. have
D. had
答案是D，与现在相反的虚拟，if后面用过去式。
2*The two strangers talked as if they ___ friends for years.
A. should be
B. would be
C. have be
D. had been
答案是D，与过去相反的虚拟，过去完成时。
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