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单选题 I _____ him last night, but I was too busy.

A

should telephone

B

should have telephoned

C

had to telephone

D

ought to telephone

正确答案 :B

解析

【精析】B句意:我本应该昨晚打电话给他,但我太忙了。情态动词用法题。“should/ought to+have+动词的过去分词”表示“本该做某事却没做”,含责备、批评或懊悔的意味。