题目列表(包括答案和解析)
We plant trees________and _____ many of the trees are growing tall.
A. year after 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
A. year after 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
We plant trees ________ and many of the trees are growing tall ________.
[ ]
A.year after 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
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