按要求完成下列各句。 1. There is enough food. Please eat as much as possible.(改为同义句) There is enough food. Please eat as much as__ __. 2. Tom left home two days ago.(改为同义句) Tom has _________ home for two days. 3. His sister had already read some books before she went to school. (改为否定句) His sister___________ books___________before she went to school. 4. I went to sleep at 9:00 last night. My father came back at 10:00 last night.(合并为一句) I________ to sleep before my father came back last night. 5. We had learned 2,000 English words by last term.(对画线部分提问) ____ English words ________you________ by last term?