—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
One of the first foreign expeditions _______ Mount Qomolangma arrived in Tibet in 1921.
#15267
A
climbing
B
climbed
C
had climbed
D
to climb
- The story is so amazing! It’s the most interesting story I’ve ever read.- But I’m afraid it won’t be liked by
#14992
A
somebody
B
everybody
C
anybody
D
nobody
----Mum, Can I have something______? ----Oh, dear . You can only drink some water. There is _____in the kitchen.
#57584
A
to drink ，nothing else
B
drinking ，something else
C
to eat ，something else
D
eating， nothing else