问题
选择题
A single pipeline ___________ all the houses with water.
A．is served
B．serves
C．are serving
D．serve
答案
答案：B
固定词组。serve sb with sth供应某人某物；句意：一根管道给所有房子供应水。
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A single pipeline ___________ all the houses with water.
A．is served
B．serves
C．are serving
D．serve
答案：B
固定词组。serve sb with sth供应某人某物；句意：一根管道给所有房子供应水。