问题
选择题
These eggs were found in the Gobi Desert by a group of scientists .[ ]
A. in the 1920
B. in the 1920s
C. in 1920s
D. in 1920s'
答案
答案：B
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These eggs were found in the Gobi Desert by a group of scientists .[ ]
A. in the 1920
B. in the 1920s
C. in 1920s
D. in 1920s'
答案：B