单项选择题

Not until three years ago ________ to work outside.

A．he began
B．he begins
C．began he
D．did he begin
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单项选择题
When we drove to the country, we saw many ________.
A．herds of cattles
B．herds of cattle
C．herd of cattle
D．herd of cattles
单项选择题
My friend and adviser ________ to lend me his money.
A．have agreed
B．has agreed
C．agreed
D．are agreed
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