问题
选择题
Both of his parents died of illness so he ______ support his family at the age of 14.[ ]
A. must
B. should
C. could
D. had to
答案
答案：D
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Both of his parents died of illness so he ______ support his family at the age of 14.[ ]
A. must
B. should
C. could
D. had to
答案：D