16. If the air was clean, we ________ have to wear masks when going out. A. wouldn’t B. won’t C. would D. will 17. I find it hard to understand that foreigner because of his ________. A. voice B. sound C. accent D. volume 18. This annual festival ________ at the end of the March. A. will hold B. will be held C. holds D. is held 19. The government has come ________ a solution to the water problems of the city. A. up to B. up with C. to with D. on to 20. Italy ________ against France in tomorrow’s final. A. has played B. played C. is playing D. plays 21. Trung speaks English like a native ________ though he comes from Vietnam. A. speak B. speaking C. speaker D. spoke 22. According to the schedule, the train ________ at 12 a.m. A. arrived B. arrive C. arrives D. arriving 23. English is the ________ language of many countries, including Britain and the Philippines. A. official B. absolute C. unique D. puzzling 24. This month’s electricity bill is too high ________ the air conditioner is turned on all the time. A. since B. due to C. although D. because of 25. All the aquatic plants and animals will die if the factory ________ dumping poison into the lake. A. will keep B. to keep C. kept D. keeps