Luyện ngữ pháp - English Grammar in Use - Intermediate
Unit 69: Countable and uncountable 1

STT	Tên task	Số câu hỏi
1	Grammar Explanations and Rules	1
2	Exercises - 69.1	12
3	Exercises - 69.2	12

Unit 68: -ing clauses

Unit 70: Countable and uncountable 2