What ________ it be? — It can’t be a mail box, for it’s moving. It ________ be a car. [ ]

How careless you are! You_______ more careful next time.

_____ in hard seats for 6 hours, we finally stepped out of the train tiredly.

Is that beautiful sweater yours–Yes. I it for two years.

Do you like to study mathematics?—____? I like it very much