7． —Why _________ your brother like baseball?—Because he thinks it is interesting．

5． — I________ Is this your pencil sharpener?—Yes ，it is． Thanks．

It is of no use ______ about it, because he will never change his mind.

9． —Your pen is very nice．—_________

9． —Is it your pen?— No，It__________ Kate．

It is strange that such a thing_______in your company.

14． —Is this your bike，David?—No， It’s not________．It's Helen’s．

1．—When is your birthday?—It ’s_________ ．

It is no use______to remember only grammar rules.

— Your name again, please. ____________.
—It's Bell Green.

The ship___________at 8:30 ,but it is almost 9:30 now.

7．— ________ ．is your pencil case?—It’s blue and white．