It is strange that he______so rude to you, though you did so much for him.

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问题 It is strange that he______so rude to you, though you did so much for him.

选项 A、should be
B、should have been
C、is
D、was

答案B

解析 本题考查虚拟语气。表述惊讶或欣喜的句中也应当用should型的虚拟语气。It isstrange that后面应用虚拟语气,根据though引导的让步状语从句中的谓语动词did可知,主句是对过去的虚拟。应用should have done,故选B。
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