----- Nội dung ảnh ----- 11. While he _________ the piano, she __________ to him. (play/listen) 12. While she __________ up her room, he __________ his car. (tidy/wash) 13. The boys __________ in the garden while she __________ the flowers. (help/water) 14. He __________ Mary when he __________ through the park. (meet/walk) 15. We __________ computer games while she __________ a book. (play/read)
