You____Tom at the party yesterday;he went abroad for a holiday last week.

—Lily,______ do you study for a math best? —By asking my teacher for help.

 ---Must I be back home before 6 o’clock? ---No, you ____. But don’t be too late.

We   have bought so much food now that Suzie won’t be with us for dinner.

Jim______   sing Chinese songs very well now, but he______do it last year.