完形填空。 It is Saturday today. Peggy and Vicky __ 1 ___ go to school. Now they're __ 2 ___ their homework. It is __ 3 __. It is __ 4 __ for them to have lunch. They leave the study (书房) and go to the __ 5 __ room. About twenty __ 6 __ later, they go back to the __ 7 __ again. Now Peggy is working on a hard problem: 'What's the next __ 8 __, please?' asks Peggy. 'Let me __ 9 __. Um, I know-it's __ 10 __.' answers Vicky. (     )1. A. aren't (     )2. A. do (     )3. A. noon (     )4. A. day (     )5. A. reading (     )6. A. years (     )7. A. classroom (     )8. A. room (     )9. A. see (     )10. A. 72 B. don't B. does B. morning B. rest B. working B. hours B. bedroom B. problem B. help B. 56 C. doesn't C. to doing C. afternoon C. duty C. dining C. minutes C. supermarket C. number C. go C. 42 D. isn't D. doing D. evening D. time D. computer D. days D. study D. picture D. read D. 40