单项选择题

I really don't know ______.

A．when started
B．when to start
C．when start
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单项选择题
He was made ______ me with my maths.
A．helped
B．helping
C．to help
单项选择题
Vegetables, eggs and meat ______ in this shop.
A．sold
B．is sold
C．are sold
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