Great changes         in China since 1978.
#39803
A
took place
B
has happened
C
have taken place
D
happened
推荐题目
My iphone 5 needs to be repaired. How much do you think it _____? 
#39258
A
would cost
B
cost
C
has cost
D
will cost
He didn’t ____ his homework.  He ____ TV all night yesterday.
#38695
A
do; watch
B
did; watches
C
does ; watches
D
do; watched
I must return the book to the library. I _____ it for one week.
#41947
A
keep
B
borrowed
C
have kept
D
have lent