Luke 21:20  “…when you see…desolation is near”
He left no question.  A few years later when the Romans surrounded Jerusalem, the disciples knew it wouldn’t end until the city was destroyed.

24  “…until the times of the Gentiles are fulfilled”
Commentaries are varied in their thinking on this.  Odd part is most of the commentaries I have access to were written before 1948 so they aren’t aware of the Jews returning to the land.  The agreement is that the Gentiles would destroy the land, namely the Romans, and that Gentiles would remain in control of it until such a time as God sees fit.  Part of this time could also be within the Tribulation period as the Antichrist will also invade Jerusalem.  At any rate, the time is set by God and will be exactly as He wants.

25  “…there will be signs in the sun, in the moon, and in the stars…”
Obviously not when the Romans invaded as Jesus didn’t return then.  Parallel instance to the end of the Tribulation.

28  “…when these things begin to happen…your redemption draws near”
Those believers who come out of the Tribulation period and are still alive can see the signs pointing to Jesus’s return.  They should still have copies of the scripture to know the Tribulation would only last seven years, but when they see the signs, they’ll know His return is upon them.

34  “…carousing, drunkenness, and cares of this life…”
Not just sin, but good stuff can get in the way as well.  Sometimes we’re too busy.  Point is to not let anything get in the way of knowing Jesus.

36  “…to escape all these things…to stand before the Son of Man”
Scripture says we will all stand before Jesus so I think this reference is to those who are redeemed.  They can stand before Christ unashamed because He has taken away their guilt.

37  “…stayed on the mountain called Olivet”
I’m thinking He actually stayed in someone’s home in Bethany or Bethphage, villages right next to the Mount of Olives.  Could have been Mary, Martha, and Lazarus or Simon the Leper or perhaps some other friends and/or relatives of those.

I hope you enjoy reading and studying His word.  May it accomplish what He desires.  Please feel free to comment or post questions.  Thanks for reading!

Scripture taken from the New King James Version®. Copyright © 1982 by Thomas Nelson. Used by permission. All rights reserved.