My family has two dogs. One is white, ________ is black.
—Will you buy the white watch or the red one ?----I’ll take_____.One is for my mother and the other is for my sister.
—What is he going to ______ when he ______ up?—He’s going to be a doctor.
I had _____useful umbrella when it rained.
—Jim, remember to return this book by Friday.— .
The book won’t until the end of the year.