问题

Is there uniform on the sofa? –No, there is on the desk.
A:a, an
B:an, a
C:a, one
D:an, one
B:an, a
C:a, one
D:an, one
正确答案是:
同类题型
It’s helpful_____ you to give me _____ useful advice.[ ]
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Excuse me, could you ____________ me a minute, please? I would like to talk to you. —Sure!