—Is that Bill's pencil ease?

—____________

A. yes, that is          B. No, it isn't             C. Yes, they are            D. No, he isn't

用方框中所给单词的适当形式填空，使短文通顺、正确、连贯(每个单词限用一次)。

Everyone wants to have healthy teeth. When you laugh, you will open your mouth and show your teeth. The healthier your teeth are, the   1.  you feel. Why is that?

It’s   2.  your teeth are important in many ways. Take care of them, and they'll help to take care of you. Strong, healthy teeth help you grow. They also help you speak   3. . You can take care of your teeth by doing like these:

Brush your teeth twice a day, after getting up and before bedtime. And you brush all of your teeth, not   4.  the front ones. Spend some time on the teeth along the sides and in the back. Take your time while   5. . Spend at least three   6.  each time you brush. Be sure your toothbrush is soft. Ask your parents to help you get a new toothbrush   7.  three months. Clean   8.  your teeth and dental floss (牙线). It   9.  strange when you do it at first, but soon you'll get used to doing it. Brushing keeps your teeth healthy. You also need to care about10.  you eat and drink. Eat lots of fruits and vegetables and drink water instead of drinks.

Do you want to have white and healthy teeth? Please brush your teeth!

一Is that your book?    一Yes___________.

    A．it  is    B．it   isn’t    C．it’s

一Is that your book?    一Yes___________.

    A．it  is    B．it   isn’t    C．it’s