−Doyouknowthemostancientcityin

− Do you know the most ancient city in China ─ Xi’an well?
− No, this is the first time I ___________ here.

A．came

B．have come

C．am coming

D．come

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相关试题

____ their hats into the air, the fans of the winning team let out loud shouts of victory.

A．To throw

B．Thrown

C．Being thrown

D．Throwing

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_____, the worse I seem to feel.

A．When I take more medicine	B．The more medicine I take
C．Taking more of the medicine	D．More medicine taken

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— They have discussed the problem for hours.
— Have they come to any_____?

A．end

B．result

C．opinion

D．conclusion

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—Where _____ Mary have put the empty bottles?
— She _____ them away. They must be somewhere.

A．can; can’t have thrown	B．must; needn’t
C．must; must have thrown	D．can; mustn’t have thrown

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He failed in the exams and only then _____ how much time he had wasted.

A．he realized

B．did he realize

C．he had realized

D．had he realized

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