51.A.water B.ice C.equipment D.oxygen
50.A.have B.having C.carry D.carrying
49.A.appearance B.way C.form D.shape
48.A.there’s B.there’re C.here’s D.here’re
47.A.energetic B.great C.heavy D.powerful
46.A.from B.between C.for D.with
45.A.deserts B.mountains C.rivers D.seas
44.A.of B.with C.for D.through
43.A.peaceful B.quiet C.lifeless D.dead
42.A.skills B.news C.intelligence D.information