问题
选择题
It is hard to say what kind of person he is. Sometimes he is very friendly; at other times he ___ be very cold. [ ]
A. can
B. must
C. will
D. shall
答案
答案：A
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It is hard to say what kind of person he is. Sometimes he is very friendly; at other times he ___ be very cold. [ ]
A. can
B. must
C. will
D. shall
答案：A