After a 68-hour flight in the Shenzhou VII spaceship, three astronauts Zhai zhigang, Liu Boming and Jing Haipeng returned to the earth .
A. safely and soundly
B. safe and sound
C. safely and sound
D. safe and soundless
网友回答
A. safely and soundly
(答案→)B. safe and sound
C. safely and sound
D. safe and soundless
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