This room is ours, and that one is ________.  ( )

A．they

B．them

C．their

D．theirs

请根据所给词的适当形式填空。
1. Tom wants to ____________ (buy) a postcard today.
2. Go straight for five ____________ (minute).
3. Usually he ____________ (walk) to school every day.
4. This is my book, that is ____________ (you).
5. Sarah ____________ (take) a trip next week.

This is ______ pencil. ______ is in the pencil case. （   ）

A．my, Yours

B．mine, Your

C．mine, Yours

It's ________ book. The book is ________. (  )

A．your; your

B．your; yours

C．yours; yours

对方问这条裙子是谁的，如果是你的，你应回答：(  )

A．It’s mine.

B．It’s yours.

C．It’s not mine.