1. 用方框内所给词的适当形式填空

buy    proper    main    lend    hold    mail

1. （1） Jack some money to me yesterday morning.
3. （2） — You should eat to keep fit.

   — OK.

5. （3） — How often do you send messages by ?

   — Once a week.

7. （4） The story is about the friendship between a dog and a cal.
9. （5） The 32nd Olympic Games will in Tokyo of Japan in 2020.
11. （6） My father promised a camera for me.