Bob would have helped us yesterday,but he________.[ ]A.was busyB.is busyC.had been busyD.will be bus
A.was busy B.is busyC.had been busy D.will be busy
题目简介
Bob would have helped us yesterday,but he________.[ ]A.was busyB.is busyC.had been busyD.will be bus
题目详情
A.was
busy
B.is busy
C.had been busy
D.will be busy
答案