--- Is _____ manager and _____ engineer to attend the meeting this afternoon?
--- I have no idea.A.a; aB.the; /C.the; theD.a; the
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B解析解本题的关键词是句首的谓语动词is，说明主语是单数，因此只有选B，the manager and engineer“经理兼工程师”，是指同一个人，而the manager and the engineer则是指“那个经理和那个工程师”，两个人，谓语动词应该用复数。