本体选择什么( )1. It ______ 3 years since he left us.( )1. It ______ 3 years since he left us. A. is B. has been C. was D. were

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本体选择什么()1.It______3yearssinceheleftus.()1.It______3yearssinceheleftus.A.isB.hasbeenC.wasD.were本体选择什么

本体选择什么( )1. It ______ 3 years since he left us.( )1. It ______ 3 years since he left us. A. is B. has been C. was D. were
本体选择什么( )1. It ______ 3 years since he left us.
( )1. It ______ 3 years since he left us.
A. is B. has been C. was D. were

本体选择什么( )1. It ______ 3 years since he left us.( )1. It ______ 3 years since he left us. A. is B. has been C. was D. were
选B,因为本句中有since一词,是现在完成时的标志词.

b

A

has been ,后面的since是一个标志

B. has been

B
since只能用于完成时态里

B