2020年军队职称英语-综合类B级词汇指导(14)

I’ve been studying the science of outer space in the last ten years and now I still ________．
A.doing
B.am
C.be
D.have
 

Jack ________ an excuse for his being absent from school yesterday．
A.invented
B.created
C.discovered
D.made
 

They wanted to find a new plant which they believed ________ in the forest．
A.was existed
B.existing
C.existed
D.to exist

 

We shall go to Shanghai on business before you ________ back next week．
A.will come
B.came
C.would come
D.come

 

Jack got sick last January and ________ in bed since then．
A.was
B.has been
C.had been
D.would be
 

Gary ________ for IBM until 1969, when he ________ a job at Sperry．
A.worked
B.had got
C.has worked
D.got
E.was working
F.has got
G.had been working
H. got
 

Considering that Tom always did well in all his subjects, he ________ in the final exam．
A.mustn’t fail
B.couldn’t have failed
C.ought not to fail
D.mustn’t have failed
 

I really can’t imagine ________ your own mother like that．
A.you treat
B.you to treat
C.why treat
D.you treating

 

Once education is made free, many children who have dropped out of school ________．
A.will come back
B.came back
C.have come back
D.had come back
 

To improve their English, some students ________ English courses during this winter vacation．
A.took
B.have taken
C.are going to take
D.would take