IN CASE YOU GET LOST IN THOSE MOUNTAINS, YOU SHOULD/ OUGHT TO/ HAD...

9. - GIÁN ÁN DE DAP AN HSG LOP 9 TX PHU THO V2
GIÁN ÁN DE DAP AN HSG LOP 9 TX PHU THO V2

9.

In case you get lost in those mountains, you should/ ought to/ had better take a map.