Almost all 4-year-olds (99.3%) in the country indeed attend primary school, (2)________ this is not compulsory until children reach the age of. Primary school is free of charge.
Giải thích
Đáp án A
Giải thích
Although= despite = in spite of : Mặc dù
Although + mệnh đề
Despite/ In spite of + Ving/ N
Due to= because of +Ving/N: Bởi vì