单项选择题

Could you tell me ______

A．when did you saw him
B．when you saw him
C．when did you see him
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单项选择题
Go along the street ______ you reach (到达，伸出) the end of the road.
A．if
B．when
C．until
单项选择题
Your school is much bigger than ______.
A．my
B．mine
C．me
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