-----If I wasn’t busy. I could have been back by 5:30 o’clock.What a pity! She her

问题补充：

-----If I wasn’t busy., I could have been back by 5:30 o’clock.

----- What a pity! She here to see you.

A. is

B. was

C. had been

D. has been

答案：

A. is

(答案→)B. was

C. had been

D. has been

解析：考查语境下的时态。依据上句应该是过去的。