III. Choose the best option to complete each of the following sentences(15 points)
81.The air in the city is very ________.
A. pollute B. pollution C. polluted D. pollutant
82.If the disaster________ in an area, people from other areas will offer help.
A. happens B. will happen C. happening D. would happen
83.Nam suggested ________ a pair of shoes for Nga on her birthday.
A. buy B. to buy C. bought D. buying
84.I live in Da Lat, ________ is one of the most beautiful cities of Vietnam.
A. who B. which C. whom D. whose
85.The _______ the disaster was engine failure, not human error.
A. reason by B. reason on C. reason why D. reason for
86.He isn’t going to the concert ________ the tickets are too expensive.
A. Though B. in spite of C. because D. because of
87.He ________ very hard recently .
A. has worked B. is working C. works D. worked
88.Tet is the most important ________ for Vietnamese people.
A. celebration B. invention C. decoration D. preparation
89.We think that Mother’s Day should be celebrated ________
A. nationhood B. nationality C. nationwide D. nation
90.If I were a bird, I______ be a dove. What about you?
A. will B. would C. shall D. may