问题

Some researchers believe that there is no doubt a cure for AIDS will be found. [ ]

A: which
B: that
C: what
D: whether

正确答案是：

同类题型

______ is waiting for you at the gate. She’s got a letter for you.

_____ useful information he has found on the Internet!

better put things back______ Otherwise, it willbe difficult to find them

always feel everything is unfair to me.–Complaints in life ________ no sense, for things will be what they should be.

—Excuse me, I wonder if you can help. I _______ my ID card. —But where did you lose it?[ ]