8.boring

(trong câu 1 có nói rằng "He stopped playing because it was boring. `=>` Điền từ boring vào chỗ trống)

9.sleep

(trong câu 3 có nói rằng "I'm tired now.I must go back to my cage and go to sleep. `=>` Điền từ sleep vào chỗ trống)

10.food

(trong câu cuối có nói rằng "Good dog.Here's your food. `=>` Điền từ food vào chỗ trống)

`8.` boring 

`-` Dẫn chứng: He stopped playing because it was boring. He needed some friends to play.

`9.` sleep

`-` Dẫn chứng: I'm tired now. I must go back to my cage and go to sleep," thought Jack.

`10.` food

`-` Dẫn chứng: Mum and Sally came home. When Sally saw Jack in his cage she said, "Good dog. Here's your food."