Was it in 1969 the American astronaut succeeded landing on the moon?A. when；onB. that；onC

问题补充：

Was it in 1969 the American astronaut succeeded landing on the moon?

A. when；on

B. that；on

C. when；in

D. that：in

答案：

A. when；on

B. that；on

C. when；in

(答案→)D. that：in

解析：该题考查强调句的疑问形式，即was it…that…,后面一空考查succeed in doing sth.句意“美国宇航员是在1969年成功登上月球的吗？”