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
____________ we can’t get seems better than ____________ we have. 
#4989
A
What; what
B
What; that
C
That; that
D
That; what
--- Do you really mean to prepare our lecture two months in advance? --- Sure. Anyway,  ___________
#4808
A
a good beginning is half done.
B
a bird in the hand is worth two in the bush.
C
a fall into a pit, a gain in your wit.
D
the early bird catches the worm.
The little boy has never been to Beijing, ________he ?
#4546
A
haven’t
B
don’t
C
has
D
Does