单项选择题

My classmate asked me ______.

A．whether did I look like my mother
B．whether I look like my mother
C．whether do I look like my mother
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单项选择题
The telephone kept ______ until I answered.
A．ring
B．rang
C．ringing
单项选择题
John is always ready ______ others.
A．helps
B．to help
C．help
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