题干

With the development of science and technology,there is no doubt_____Chinese
astronauts will land on the moon in the near future.

A:whether

B:that

C:what

D:which

上一题 下一题 0.0难度 选择题 更新时间:2012-10-10 01:39:53

答案(点此获取答案解析)

B