单项选择题

She can't help______ the house because she's busy making a cake.

A．to clean
B．cleaning
C．cleaned
D．being cleaned
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单项选择题
A．He had never stood before a video camera．B．He had never read his own article before a video camera．C．This camera was different from the one he had once face
A．He had never stood before a video camera．
B．He had never read his own article before a video camera．
C．This camera was different from the one he had once face
单项选择题
A．20．B．13．C．15．
A．20．
B．13．
C．15．
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