【題目】Betty is sad these days. Let’s go and _________. ( )
A.cheer on herB.cheer her onC.cheer up herD.cheer her up
【題目】—Can you help me, Dad? I can’t ________ the box on the shelf （架子）. ( )
—My hands are full of things. You can stand on a chair.
【題目】Don’t be late for school, study hard ________. ( )
A.from then onB.just now.C.just thenD.from now on