¡¡1. Jack is the tallest boy in our class.

¡¡¡¡¡¡¡¡Jack is taller than _____ other _____ in our class.

¡¡¡¡2. Mrs Smith is busy now. She is doing her housework at home.

¡¡¡¡¡¡Mrs Smith is _____ _____ her housework at home.

¡¡¡¡3. "Did you have a good sleep last night?" David asked Jim.

¡¡¡¡¡¡David asked Jim _____ he _____ well last night.

¡¡¡¡4. The motorbike cost him 8000 yuan last year.

¡¡¡¡¡¡He _____ 8000 yuan _____ the motorbike last year.