根据提示填空（每空一词）
Keeping healthy ____ (is/are) very important.

Remember         the book to the library when you finish        it.

I find it difficult          this song.

It’s important       how to do chores.

—Do you climb mountains every day?
—Yes,        a little exercise. I’m so out of shape.

—Mary dances best in our school.
—I agree. I’ll never forget        her dance for the first time.

How kind you are! You always do what you can        others.

The Greens have a comfortable house      .

His mother was very patient and didn’t give up        to help him.

Danny did all kinds of things to make the baby       .