英语题2道大家帮忙1.He___________the case before people could know it. A. might investigate B. might have been investigating C. might have investigated D. might have been investigated 2.The plane___________off. A. take B. may have been tak

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英语题2道大家帮忙1.He___________the case before people could know it. A. might investigate B. might have been investigating C. might have investigated D. might have been investigated 2.The plane___________off. A. take B. may have been tak
英语题2道大家帮忙
1.He___________the case before people could know it.
A. might investigate
B. might have been investigating
C. might have investigated
D. might have been investigated
2.The plane___________off.
A. take
B. may have been taken
C. may be taking
D. was taken
求助

英语题2道大家帮忙1.He___________the case before people could know it. A. might investigate B. might have been investigating C. might have investigated D. might have been investigated 2.The plane___________off. A. take B. may have been tak
1.C
2.C

1 B
2 B

C,C

1.C 他是主动调查，所以不能用被动语态排除B和D，又因为是是对将来的推测，所以用might have done sth ，表示那个时候某事可能已经做好
2。 A 飞机起飞不能用被动，排除BCD

C 从后面可以看出是过去时态，而且不是延续的动作，只是强调已经调查过
C take off起飞，不需要用被动，BD排除，C不能这么说，如果是may is going to take off就可以

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