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-Look!Howdirtytheriveris!   -Butit

練習題1.95W

問題詳情:

-Look!Howdirtytheriveris!   -Butit

-Look! How dirty the river is!

    -But it ________ clear before a factory was set up nearby.

    A. used to be  B. will be   C. has been D. is

【回答】

A

知識點:動詞和動詞短語

題型:選擇題

標籤:butit