In the past twenty years great changes _______in China.
#103431
A
were taken place
B
have been taken place
C
have taken place
D
were happened
推荐题目
To our great relief, Jack’s illness proved not to be as serious as we ___.
#99958
A
had feared
B
has feared
C
would fear
D
feared
Our teacher taught us that water ___ at zero degree centigtade.
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A
freezes
B
freeze
C
freezed
D
is freezed
He works as an engineer now, but he _____ on a farm for three years.
#101493
A
has worked
B
worked
C
was working
D
had worked