—You forgot______ off the lights? It’s still on.—But I remember _______them off before I went out of the room.
More and more people find ______ necessary to protect our earth.
My father has ______ for two weeks.I miss him so much.
The listening test usually ______ 20% of the English test.
—What’re the rules in class? —First, mobile phones can’t be ______.
—Could you please______? —Yes, sure.