Luyện ngữ pháp - English Grammar in Use - Intermediate
Unit 20: I am going to do

STT	Tên task	Số câu hỏi
1	Grammar Explanations and Rules	1
2	Exercises - 20.1	4
3	Exercises - 20.2	5
4	Exercises - 20.3	4
5	Exercises - 20.4	7