从方框中选择恰当的词并用其适当形式填空。

Host: Welcome to 9 o'clock Weekend Talk. We're talking to Bill, a____ boy. He is from US. Hello, Bill. Welcome to the show.

Bill: Thank you.

Host: You came to China five years ago. Your Chinese must be very good.

Bill: I practice ____ it every day. I ____ reading Chinese stories and listening to Chinese songs.

Host: Do you like to play ____?

Bill: Yes, I do. And basketball is my favorite.

Host: Really? What do you ____ baseball?  

Bill: I love it, too. ____ American boys love to play it.

Host: Do you like to watch TV?

Bill: Yes, I do.

Host: What do you think of soap shows?

Bill: I ____ them. They are really boring.

Host: ____ Chinese Cooking?

Bill: I don't mind it. In fact, my mom loves it.

Host: How do you ____ China?

Bill: It's great.

Host: OK! Thank you for ____ us, Bill!

Bill: You're welcome.

如图，在平面直角坐标系中，四边形ABCD是矩形，AD∥x轴，A（﹣3，$\frac{3}{2}$），AB=1，AD=2．

海陆变迁的主要原因是____和____．