-The two astronauts had been trained for long before theyflew to space. -Oh,
题型:同步题难度:来源:
-The two astronauts had been trained for long before theyflew to space. -Oh, they____quite a lot of difficulties. |
[ ] |
A. might go through B.may go through C. should have gone through D. must have gone through |
答案
D |
举一反三
-Have you ever comehere before? -No, it is the first time that I _ to this city. |
[ ] |
A. come B. came C. had come D. have come |
The country life he was accustomed to________ greatly since 1992. |
[ ] |
A. has changed B. change C. changing D. have changed |
— This is the first time that I _____ to Chongqing. — Really? Don"t worry. I _____ a good guide for you. |
[ ] |
A. have come; will find B. have come; am going to find C. come; am to find D. come; am going to find |
I have lost one of my gloves. I _____ it somewhere. |
[ ] |
A. must drop B. must have dropped C. must be dropping D. must have been dropped |
They came here several years ago, and ____ ever since. |
[ ] |
A. settled B. settled down C. lived in D. have settled down |
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