—I think everyone must do his best to _______pollution.—If so, there will be a good future for people of tomorrow.A. keep B. stop C. stand
The beautiful girl _________came here last Saturday is my friend.
—Bill, is the pink umbrella Ann’s? —No, it __________ be hers. Hers is purple.
—You won the first prize in the Physics competition. —. I made several terrible mistakes.
—Eric stayed at home because he hurt ________ when he went home by bike. —Sorry to hear that. Let’s visit after school.
—Are you going to Mary’s party tonight? —No, I won’t go__________ you go.