Scarcely does anyone want to become janitors, but to be appointed as a sanitary engineer is quite something else.

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问题 Scarcely does anyone want to become janitors, but to be appointed as a sanitary engineer is quite something else.

选项 A、senior
B、military
C、clean
D、skilled

答案C

解析 sanitary(有关)卫生的，清洁的。四个选项：clean清洁的；senior年长的，资格老的；military军事的，军用的；skilled熟练的。

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