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 ________.