Large quantities of water into the machine to cool it down. [ ]A. are pouring B.
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![Large quantities of water into the machine to cool it down. [ ]A. are pouring B.](/pic/43_1424431.jpg)
Large quantities of water _________ into the machine to cool it down. [ ]A. are pouring
B. is pouring
C. is being poured
D. are being poured
试题答案
D