Choose the best answer to complete the flollowing sentences : 1. The Samba Parade in Rio Carnival has thousands of samba..............from various samba schools. A. Perform B. performance C. performer D. performers 2 By the middle of the 21st century, people in developing countries ........................ more renewable energy. A. uses B. will be using C. used D. have used 3.They prefer to going .................... their car than ........................ the train. A.by - on B.in - on C.in - in D,on -in 4 . ........................ books are here __________ are there. A. Theirs/ Ours B. Their/ Our C. Theirs/ Our D. Their/ Ours 5.I have known her..two years. A. with B. for C. since D. in 6 A/ an ............................ is a very large city with a population of over ten million people A megacity B multicity C historicity D electricity 7 Hung has visited ........................ countries than Hang A fewer B less Ca few D much 8 It is estimated that about 81 million people add to the world's population annually,.........? A isn't it B is it C does it D doesn't it 9. I love cooking, ........................ my sister doesnt. A. because B. so C.but D. and 10. If it doesn't rain soon , there'll be a great............................. of water A shortage B shorten C shortness D short GIẢI THÍCH VÌ SAO BẠN CHỌN ĐÁP ÁN ĐÓ