The teacher asked the students ________.

A．what they were doing at that moment

B．what were they doing at that moment

C．how are they doing at that moment

D．what they are doing at that moment

A crow（乌鸦）is sitting in a big tree. She has a big piece of meat in her mouth.“My babies will have a nice breakfast,”she thinks. An old fox is looking for his breakfast. He sees the crow and the meat.“How can I get that piece of meat?”he thinks.

“Good morning, Mrs. Crow.”says the fox,“How are you?”But the crow doesn’t say a word. “You have very nice babies, Mrs. Crow.”says the fox,“How are they? May I see them ?”Still the crow doesn’t say a word.

“You are very beautiful, Mrs. Crow, and you have a beautiful voice（嗓子）,too.”says the fox,“Would you please sing a song for me? ”Mrs. Crow thinks“How nice Mr. Fox is! I must sing him a song.”So she opens her mouth and begins to sing. At that time, the meat drops down（掉下）from her mouth.?

1.There’s a piece of bread in the crow’s mouth.

2.The old fox wants the crow to sing for him very much.

3.The crow doesn’t say a word to the fox because she doesn’t like the fox at all.

4.When she opens her mouth, the fox eats the baby crows.

5.The old fox has a nice breakfast.

I can’t understand _______ Apple's iPad 2.

A. why are they so mad about.        B. why they are 80 Bad about

C. how are they so mad about        D, how they are 80 mad about