翎de黑衣
花朵
共回答了13个问题采纳率:84.6% 举报
have been polluted
have 是跟着 quantities这个复数名词走而不是water
参见:
Coal
Large quantities of water are frequently needed to remove impurities from coal at the mine.
1年前
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翎de黑衣
是的,参见: A large quantity of air-conditioners has been sold since the temperature is high.