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
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单项选择题
I ________ him the Christmas gift by mail because he came home during the Christmas holidays.
A．ought to have sent
B．couldn’t have sent
C．must have sent
D．needn’t have sent
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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