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— How about buying an iPhone 4s for your mother’s birthday?
— Oh, maybe it’s too expensive, Dad. Do you know _______?A．how much does it cost B．how much it costs C．how much it cost D．how much did it cost
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解答
B
这道题主要考察“主语从句”知识点，在家长帮App有相关的学而思名师精编考题，快去看看吧！
举一反三
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Michael Jordan has failed over and over again in his life．And that’s _________ he succeeds．
A．what B．when C．why D．where -
Do you know where ______ from?
A．he come B．he comes C．did he come D．does he came -
—It seems _____ you like to work with children.
—Yes, they are so lovely.
A. that
B. what
C. to
D. as
