Mark the letter A, B, C, or D on your answer sheet to indicate the cor

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.    

In my free-time, I often help mom with ________ the house. 

• A. A. clean
• B. B. to clean
• C. C. cleans
• D. D. cleaning

with + V-ing: với gì đó
Tạm dịch: Khi rảnh tôi thường giúp mẹ dọn nhà