问题
选择题
. He knows nothing about it, so he can’t help _______ any of your work.
A．doing
B．to do
C．being doing
D．to be done
答案
答案：A
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. He knows nothing about it, so he can’t help _______ any of your work.
A．doing
B．to do
C．being doing
D．to be done
答案：A