Bài tập Từ vựng và Ngữ pháp
                                                    Exercise 1. Read the text and choose the best answer to fill in ecah numbered blank. Exercise 2. Read the email and choose the best answer to fill in ecah numbered blank. Exercise 3. Read the advertisement and choose the best answer to fill in ecah numbered blank. Exercise 4. Read the announcement and choose the best answer to fill in ecah numbered blank. 
                                                    
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