Question

Was it in 1969_________ the American astronauts succeeded__________landingon the moon?

1. A.
   when；on
2. B.
   that；on
3. C.
   when；in
4. D.
   that；in

Answer 1

D
将这个句子转换成陈述句，即：It was in 1969_______ the American astronauts succeeded__________ landing on the moon．便会发现这是一个强调句型，故答案D正确。