—Would you mind if I borrowed your car just over the weekend?
—I'm sorry, but it's just not possible, because I ________ my mother this weekend.
A．am visiting B．have visited
C．was visiting D．visited
They ________ my ability to solve problems, but I have proved that they are all wrong.
A．opposed B．doubted
C．wondered D．ignored
My patience is ________. Don't keep me waiting any more.
A．gathering up B．breaking out
C．running out D．keeping up
Growing up ________ Michael Jordan was in his prime，Beijing native Wu You knew what he wanted to do.
A．since B．when
C．until D．before
It ________ have been her to leave her child alone and do whatever she wanted. She isn't such a person.
A．couldn't B．mustn't
C．mightn't D．wouldn't
Microblog is a platform ________ people can express their thoughts, show their daily life and communicate with each other by sending post.
A．what B．which C．where D．when
