问题
选择题
The old man is quite weak after the accident, so he _____ . [ ]
A. must take care of
B. must be take care of
C. must look after
D. must be looked after
答案
答案：D
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The old man is quite weak after the accident, so he _____ . [ ]
A. must take care of
B. must be take care of
C. must look after
D. must be looked after
答案：D