问题
选择题
He's heavy now. He ______________ eat vegetables. [ ]
A. have
B. have to
C. has to
答案
答案：C
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He's heavy now. He ______________ eat vegetables. [ ]
A. have
B. have to
C. has to
答案：C
，正电荷
，正电荷
，负电荷
，负电荷