|
16. Dont put the waste on the ground. Oh, Im very sorry. I _____the dustbin there. A. dont see B. isnt seeing C. didnt see D. havent see 17. How is the weather in your country this summer? It _____as much as it does now for a long time. A. hasnt rained B. doesnt rain C. wasnt raining D. didnt rain 18. Does Liu Hui serve in the army? No, but he _____in the army for three years. A. served B. has served C. is serving D. would serve 19. Sorry. I _____to post the letter for you. Never mind. _____it myself after school. A. forget; Id rather post B. forgot; Ill post C. forgot; Im going to post D. forget; Id better post 20. Unfortunately, when I dropped in, Professor Smith _____, so we only had time for a few words. A. has just left B. had just left C. just left D. was just leaving | 
