Ifit__________possible,Iwouldhavehelpedhim,butIwastoobusy.

分类: (中学)英语学科知识与教学能力 发布时间: 2023-11-03 07:40 浏览量: 0

Ifit__________possible,Iwouldhavehelpedhim,butIwastoobusy.

A.is

B.was

C.were

D.had been

正确答案是D