问题
选择题
-Where is Tom?
-He hasn't come to school today. I think he __________ be ill.[ ]
A. has to
B. should
C. may
D. need
答案
答案：C
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-Where is Tom?
-He hasn't come to school today. I think he __________ be ill.[ ]
A. has to
B. should
C. may
D. need
答案：C