Oh yeah?（）are you going to stay?Only for four days.I don‘t l

Oh yeah?（）are you going to stay?Only for four days.I don‘t like （）away for too long.
A how long ；going
B how long；leaving
C how soon；going
D how soon：leaving要说出how long和how soon的区别和leave away和go away的区别以及为什么要用这个单词,