Look,　Sue　is　over　there.-　That　____　be　her.　She　is　in　Canada　now.

Not until he left his home ______ to know how important the family was for him.

The books are so nice, which one can I take? —Oh, you can take _______ of them. I’ll keep none.

Must I work out the problem right now?—Yes, you _______. It’s very serious.

The girl __________ all her savings to the people in the Southwest for the serious drought(旱灾). —What a donation and what a nice girl!