Was it in 1969 the American astronaut succeeded landing on the moon?
A. when; on
B. that; on
C. when; in
D. that; in
网友回答
A. when; on
B. that; on
C. when; in
(答案→)D. that; in
解析：考查强调句和介词：第一空填that是强调句的一般疑问句，结构是：Was/Is it +强调部分+that（指人也可以是who），这句话强调的是时间状语，第二空填介词succeed in doing成功的做…，句意：是在1969年美国人成功的登陆月球的吗？选D。