----- Nội dung dịch tự động từ ảnh ----- Practice Combine the sentences 1. Your mother can't sit up. She is very weak. = 2. We couldn't finish the test. It was so difficult. 3. They were very worried. They couldn't talk to each other. = 4. The children couldn't see the first part of the film. They came late. = 5. The little boy is not old enough. He can't dress himself. =