----- Nội dung dịch tự động từ ảnh ----- Question 2: It's tiring to sit in front of the computer for hours. A. Sitting in front of the computer for hours is tiring. B. Sit in front of the computer for hours is tiring. C. Sat in front of the computer for hours is tiring. D. To sit in front of the computer for hours is tiring. Question 3: He passed the exam because he's intelligent. A. He's intelligent, but he passed the exam. B. He's intelligent, and he passed the exam. C. He's intelligent, for he passed the exam. D. He's intelligent, so he passed the exam
