Tom's father,as well as his mother,( )in New York for a few

D
主语是 Tom's father (注意不是 his mother), 故后接单三形式, 排除 A C
这里有两种说法：
1.用复合宾语 asks him to stay (b 的宾语 he 形式有误）
2. 接宾语从句 ask（that ) he (should) stay
ask 后接从句时 用should 加动词原形, should 可省, 这是虚拟语气

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