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---Whydoesthelakesmellterrible?---Becauselargequantitie...

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問題詳情:

---Whydoesthelakesmellterrible?---Becauselargequantitie...

--- Why does the lake smell terrible?

---Because large quantities of water        .

A.have polluted                                      B.is being polluted

C.have been polluted                                  D.has been polluted

【回答】

C

知識點:動詞時態與語態

題型:選擇題