There are two ________ in the restaurant. They are very young.A.inventorsB.cooksC.singersD.dancers
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B解析【解析】动词后加词尾-er或-or,既可表示“该动作的执行者”,又可表示“做某事的器物”,如sing-singer(歌手),dance-dancer(舞者),invent-inventor(发明者)。但cook例外。由于cook本身可以作名词,表示“厨师”,所以cooker只作“炊具”解。因此,