问题

Some researchers believe that there is no doubt______a cure for AIDS will be found.[ ]
A: which
B: what
C: that
D: whether
B: what
C: that
D: whether
正确答案是:
同类题型
I am afraid there’s ____________with thecomputer. Can you come and have a look
he development of science, more newtechnology ______to the field of IT.
Hi, Jim. I hear that you’ve just come back from Sanya. I’m calling to ask .-Great!
________ seems to be no possibility _______ the shy girl can win the first prize in the contest.