I don't understand the usage of some simple words~ ①---When will you be back,Pete? ----_____ a couple of days Why can only fill in "in" but not "for"? ②____ so many people ill, i've decided to cancel the meeting. Why can only fill in with this blank, not after? ③It's been snwing for 3 days and it's quite cold these days_____ November Why can't we use as for this empty space? Why can't we use on~ ④ Is there a usage of on the phone? Is there a usage of in the phone / from the phone~ Thank you very much~

I don't understand the usage of some simple words~ ①---When will you be back,Pete? ----_____ a couple of days Why can only fill in "in" but not "for"? ②____ so many people ill, i've decided to cancel the meeting. Why can only fill in with this blank, not after? ③It's been snwing for 3 days and it's quite cold these days_____ November Why can't we use as for this empty space? Why can't we use on~ ④ Is there a usage of on the phone? Is there a usage of in the phone / from the phone~ Thank you very much~

1. In a couple of days, this is a phrase that needs to be memorized by you. 2. There is a conditional meaning in the sentence with, that is to say, with so many people getting sick, I have to cancel the meeting