When the students were playing games on the playground, Jim suddenly stopped _____and began to cry, so we stopped _______ what was wrong with him.
The street is so dirty that we can see litter ________. A. everywhere B. somewhere C. nowhere
-- Thank you for giving me so much help! -- ________ A. It’s a pleasure. B. It doesn’t matter. C. It’s fun.
The air pollution is serious, ________ we must try our best to reduce it. A. so B. or C. if
--The river used to be clean. How does it become dirty? -- There are many factories ________ waste water into it. A. pouring B. pour C. poured
-- ________ Why don’t you clean your room? -- Sorry, I’ll do it right away. A. Take it easy. B. What a mess! C. Don’t worry.