1,--Today,are you free now I have a favor to ask of you.
--_____
A It is a pleasure B Go ahead C Help yourself D Ask,please
2,Had it been at all possible I would have gone to visit him in the hospital,but I ___fully occupied the whole of last week.
A am B was C have been D were
3,It was already past midnight and only three young men ___ in the tea house.
A left B remained C delayed D deserted
第一题为什么不选D,ask of 怎么理解
第二题中的Had it been at all possible 怎么理解 做什么成分
第三题中的选项A 也有剩下的意思为什么不选A