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：

标签： believe , researchers , some

同类题型

We’ll have a picnic if it ______ tomorrow.

Who’s the little baby in the photo, Susan?— It’s me. This photo ten years ago.

The free gift doesn’t look good.—-________, madam, but if you want good quality, you have to pay for it.

is Tommy?—Maybe he is in the hospital. He told me that he had sore eyes.

Could I speak to Miss Smith, please?—______． She’s gone to the post office．