—Is there any vaccine(疫苗) against H1N1 flu that can be used on humans?—No, but scientists are working to develop ________ .
#16397
A
that
B
it
C
one
D
so
推荐题目
I got this bicycle for ________：My friend gave it to me when she bought a new one.
#14691
A
everything
B
something
C
anything
D
nothing
Most of us found ______ difficult to finish the work in such a short time.
#15245
A
this
B
which
C
what
D
it
(2013·长春市高三二模)I know you want to borrow money but I don't have ________ at hand myself.
#14776
A
any
B
either
C
anything
D
nothing
---- The exam was too difficult, wasn’t it?---- Yes, ______ could not pass it.
#15688
A
somebody
B
anybody
C
nobody
D
everybody