【sorry,butyouraddressagain,please.I_____catchit.Adidn'tBdon'tCwon'tDwouldn't(还有问一下catchThesummervacationwillbeginnextweek.David______tostaywithus.AwillbecomingBcomesCcameDiscoming(答案是D现在进行时表】

　　sorry,butyouraddressagain,please.I_____catchit.

　　Adidn'tBdon'tCwon'tDwouldn't

　　(还有问一下catch

　　Thesummervacationwillbeginnextweek.David______tostaywithus.

　　AwillbecomingBcomesCcameDiscoming

　　(答案是D现在进行时表将来,但是为什么不可以选A?A是标准的将来时,不是用现在进行时表将来可以与将来时态换着用么?当然是将来时包含现在进行时表将来)