Tom______better than to ask Dick for help.A、shall knowB、shouldn’t knowC、has kn

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问题 Tom______better than to ask Dick for help.

选项 A、shall know
B、shouldn’t know
C、has known
D、should have known

答案 D

解析语法知识。与现在事实相反，也就是事实是他去找dick寻求帮助了，而这里说Tom应该知晓得更多而不是找dick寻求帮助，应该用“should+完成时”构成的虚拟语气结构。故答案为D。

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