Are Mr. and Mrs. Wang living alone in the house? —-Yes, altough they have three sons, of them live with their parents.

___ is that white bag? -It’s nine dollars.[ ]

Have you finished your work yet?—No，not yet. I think it’ll take ________ minutes.

You look so. . What’s wrong? -I can’t find my ID card.

These are ____ erasers,and _____ are white.