问题
选择题
Make a tentative guess _____ Peking Man _____ have done and used thousands of years ago. [ ]
A. that; may
B. that; must
C. what; may
D. what; should
答案
答案：C
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Make a tentative guess _____ Peking Man _____ have done and used thousands of years ago. [ ]
A. that; may
B. that; must
C. what; may
D. what; should
答案：C