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

问题补充：

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

A. when; on

B. that; on

C. that; in

D. when; in

答案：

A. when; on

B. that; on

(答案→)C. that; in

D. when; in

解析：考查强调句和词组：第一空考查强调句，结构是：it is/was+强调部分+that+剩余部分，这句话强调的是时间状语in 1969，第二空考查词组succeed in doing成功的做…，句意：是在199年美国宇航员成功的登陆月球的吗？选C。