Large quantities of polluted water_____ into the sea so that lots of fish died.

A. is flowing   B. was flowing    C. are flowing     D. were flowing

D


解析:

quantity作主語(yǔ)時(shí),謂語(yǔ)動(dòng)詞要與quantity的單復(fù)數(shù)保持一致, 此處quantity為復(fù)數(shù)，再由后一句的時(shí)態(tài)可知答案為D。

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