完成句子，使改写后的句子完整，并与原句意思相符，注意每空只填一个单词。 1. He won't come tomorrow because he is busy. He won't come tomorrow because he________ ________ time. 2. You must succeed if you work hard. You must ________ ________ if you work hard. 3. They want to keep healthy, so they often do sports. They want to ________ ________ ________ ________, so they often do sports. 4. Red is my favorite. I _______ red ________. 5. Mr. Green is my father's father and Mrs. Green is my father's mother. Mr. and Mrs. Green ________ my ________.