The main cause of HIV / AIDS infection in China is drug abuse,  ______ is very serious in Yunnan.
#4983
A
what
B
who
C
that
D
which
推荐题目
–The floor is dirty. Can anyone clean it?   –_____I do it all the time.
#4875
A
Don’t mention it.
B
Why you?
C
Not sure
D
Not me again.
 I prefer _______ to __________ in my spare time.
#4699
A
singing… dancing
B
sing… dance
C
to sing... dance
D
to sing…dancing
He is afraid to face the problems he’ll have     the exam.
#4581
A
to pass
B
passed
C
passing
D
been passing