问题补充：
It Yang Liwei about 21 hours the earth 14 times in his spaceship.
A. spent; circling
B. took; traveling
C. spent; to travel
D. took; to circle
答案：
A. spent; circling
B. took; traveling
C. spent; to travel
(答案→)D. took; to circle
解析：此题重点考查重点句型结构it takes sb some time to do sth表示某人花费多少时间做某事。
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