【1,--Today,areyoufreenowIhaveafavortoaskofyou.--_____AItisapleasureBGoaheadCHelpyourselfDAsk,please2,HaditbeenatallpossibleIwouldhavegonetovisithiminthehospital,butI___fullyoccupiedthewholeoflastweek.Aam】

　　1,--Today,areyoufreenowIhaveafavortoaskofyou.

　　--_____

　　AItisapleasureBGoaheadCHelpyourselfDAsk,please

　　2,HaditbeenatallpossibleIwouldhavegonetovisithiminthehospital,butI___fullyoccupiedthewholeoflastweek.

　　AamBwasChavebeenDwere

　　3,Itwasalreadypastmidnightandonlythreeyoungmen___intheteahouse.

　　AleftBremainedCdelayedDdeserted

　　第一题为什么不选D,askof怎么理解

　　第二题中的Haditbeenatallpossible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