听力原文：

B: Hi, Mom!

W: Hello, Carl! Where are you?

B: I’m standing on the Great Wall of China and talking to you.

W: Really? That’s great.

B: We’re on a school trip.

W: What about the others? Are they with you?

B: Well, right now Wang Ning is eating ice cream. Tony is buying presents and postcards.

W: Please take some photos of the Great Wall and send them to me by e-mail.

B: OK. We’re enjoying the school trip a lot. Anyway, it’s time to go back to school now. Bye, Mom.

W: Bye, Carl.

Question: What does Carl’s mom want him to do?

参考答案：

She wants him to take some photos of the Great Wall and send them to her by e-mail.