单项选择题

We have studied for two hours. Let's stop ______.

A．have a rest
B．to have a rest
C．having a rest
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单项选择题
—How long have you been ill —______.
A．Since last week
B．A week ago
C．Once a week
单项选择题
Either Jim or Sam ______ going to help the farmers with the orange harvest this afternoon.
A．was
B．were
C．is
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