问题补充：
With the development of science and technology，there is no doubtChinese
astronauts will land on the moon in the near future.
A. whether
B. that
C. what
D. which
答案：
A. whether
(答案→)B. that
C. what
D. which
解析：考查doubt的用法。doubt用于肯定句时用whether引导同位语从句；用于否定句时，用that引导。例如：There is no doubt that...“......是毫无疑问的。”；There is some doubt whether he will come.。本题是否定句，故用that，选B.
