Great changes _____ in China in the past 30 years and many Chinese are living a happy life today. 
#99354
A
took place
B
were taken place
C
have taken place
D
have been taken place
推荐题目
Jack doesn’t smoke now, but he ______________ for almost twenty years.
#101839
A
was smoking
B
smoked
C
has smoked
D
had smoked
I don't know when he ___. But when he ___ back, I’ll let you know.
#103935
A
comes ; will come
B
will come; comes
C
comes;comes
D
will come; will come