问题
选择题
The spaceman returned to Earth and safely landed in that area _____ the night of April 29. [ ]
A. in
B. on
C. at
D. by
答案
答案：B
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The spaceman returned to Earth and safely landed in that area _____ the night of April 29. [ ]
A. in
B. on
C. at
D. by
答案：B