Dave has ___friends here, so he often stays at home by himself and feels lonely.
—Remember ____ off the lights when you leave the room.—OK. I will.
—Which kind of food smells ____ or tastes____?—Sorry, I don’t know.
—Do you think the students need to have lunch at school?—____. It’s good for them to save time.
—Will you please ____ so much noise, Dongdong?—Sorry. I won’t.
I don’t know ____ or not he is right.