电路原理图也叫:My class teacher_______you this afternoon , but no one answered.

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My class teacher_______you this afternoon , but no one answered.
A.did telephone B.had telephoned
C.do telephone D.would telephone

A
do do sth.
表示强调的说法,“确实....了”,当然也要注意时态的问题,此题用过去式

a

but no one answered看出是过去且完成 所以选B

B

A

肯定是B