Choose the correct preposition to coplete the sentences. 1.do not forget to check (at/in) two hours before your flight. 2.if you do not throw these scrissors(away/up), you will be in trouble with the security check. 3.we'll have to get rid (of/off) these old newspapers.nobody needs them. 4.hurry up! your flight is (on/in) time . 5.i like to sit (by/in) the windiw , but i got a place (by/in) the aisle
