試題詳解

52. The Space Race was a competition roughly from 1957 to 1969 when __________.
(A) America and the former Soviet Union raced each other to explore space and land humans on the Moon.
(B) America and the former Soviet Union raced each other to Mars and back.
(C) America and the former Soviet Union were trying to send a race of people to space.
(D) America and the former Soviet Union wanted to give each other space.