摘要： 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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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
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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