We plant trees and many of the trees are growing tall. A. year after year; year
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Weplant trees________and _____ manyof the trees are growing tall.
A. yearafter year; year after year B.year by year; year by year
C.year after year; year by year D.year by year; year after year
试题答案
答案：C
提示：| yearafter year=every year, year by year是指逐年变化。
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