问题
选择题
The old man was quite weak after the accident, so he______.
A．must look after
B．must be taken care
C．must be looked after
D．must take care of
答案
答案：D
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The old man was quite weak after the accident, so he______.
A．must look after
B．must be taken care
C．must be looked after
D．must take care of
答案：D