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2 ( ) 1 The population of the world has grown very fast ____ four hundred years. A. for past the B. in the pass C. in the past D. for past ( ) 2 We returned to our hometown___. A. next week B. in the last week C. last week D. for a week ( ) 3 Great changes have taken place___. A. in the last few year B. in the last few years C. last year D. on the last year