B1,Chọn một từ đúng trong ngoặc để hoàn thành các câu sau 
1,Air.....is a big problem in many cities in the world (pollute)
2,There are a lot.....mountains in VN (beauty) 
3,Edison's most famous........was the electric bulb (invent) 
4,He was very.....of the work he had done(pride)
5,He is.....in playing soccer (interest)
B2 :Cho dạng đúng của động từ trong ngoặc để hoàn thành các câu sau 
1,Nam (go) to school by bicycle every day 
2,When I came home from work, they (cook)dinner at 7 p.m
3,If I were rich,I (travel) around the world 
4,My mother used (make) us clean the house 
5,My house (build) at present