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单项选择题

A．were takenB．have been takenC．will be takenD．are taken……

Although many measures （），the world's economy is still going down．

A．were taken
B．have been taken
C．will be taken
D．are taken

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单项选择题My school is about twenty （）walk from here.

A. minute
B. minutes'
C. minute's
D. minutes