题目

21.______ we know more and more about George,we find that he is a man who can not be trusted.
A.Then B.If C.Unless D.As
22.I finished the job on August 28th,but ______ a very interesting event had taken place.
A.meanwhile B.meantime C.meanings D.mealtime
23.The gentleman over there told me that he was not living here and he was only here ____.
A.in a visit B.for a visit
C.with a visit D.on a visit
26.If I ______ how difficult the experiment was,I would never have taken part in it.
A.knew B.know C.did know D.had known
27.If you stay in this hotel,you should know that dinner costs $5,and wine is ______.
A.extra B.extent C.extensive D.extract
28.When the teacher came into the classroom,all the students stopped ______.
A.to talk B.and talk C.and talked D.talking
29.This is regarded by the government as a possible ______ to national security.
A.thread B.threat C.thrill D.thrift
30.Police have _____ the area for about two days

提问时间：2021-01-15

答案

21.D 不能选B,如果选,应该是will find
22.A
23.B
26.A
27.A
28.D
29.B
30.A
31.A
32.B
33.B
34.A
35.A
36.A
37.C
38.B
39.B
40.B