SỬA LẠI LỖI 1. In late summer, fire is a greatest danger to forests A.in b. fire c. a d.to 2. i would have sent you an postcard if i had had your sddress a. would b. sent c. an d.had 3.Mr. smith works at heathrow airport ,that is one of the biggest airports in the world a. works b. that c. the d. in 4.if had known your address ,i will have gone to see you lát month a.known b. will c.see