---What ______ the forest of Yangzhou in the last 30 years?---Yangzhou has become much greener.
#39620
A
has happened to
B
was happened to
C
has happened at
D
is happening
推荐题目
We’ll go for a walk if it      tomorrow.
#39553
A
will not rain
B
isn’t raining
C
doesn’t rain
D
wasn’t raining
 Listen! My sister_______ the piano in her room.
#39812
A
play
B
is playing
C
plays
D
Playing
--- Listen ! Who _______in the room? ---Let’s go and see.
#37567
A
is crying
B
crying
C
cry
D
cries
—Hello! May I speak to Alice?—Sorry, she _____ Shanghai. 
#36873
A
have gone to
B
has been to
C
has been in
D
has gone to