题目内容：

阅读短文,根据短文内容，判断下列句子正误。正确的用“A”表示，不正确的用“B”表示。

Ms James: This morning’s class is about first aid (急救), or offering someone medical help. Let’s imagine an accident. A boy is lying on the ground. He isn’t moving or making a sound. He is in a lot of pain (痛苦万分). What can we do to help him?

Betty: First of all, find out what’s the matter with him.

Ms James: How do we do that?

Betty: Ask him.

Ms James: Ok. But he could have trouble hearing you or speaking to you.

Lingling: Shout for help? Call 120?

Ms James: Good idea, but what should we do before help arrives?

Tony: Make him comfortable.

Ms James: And how can we do that?

Tony: Lift him up and sit him on a chair?

Ms James: No, that could be dangerous! You could drop him and hurt him even more. Betty, you must know! You did some medical training.

Betty: Make sure he’s warm. Cover him with a coat.

Ms James: That’s such good advice that you could be a doctor, Betty!

1. Not all the students in Ms James’ class know the enough knowledge (知识) about first aid.

2.We should move the boy to a more comfortable place before help arrives.

3.It is a good idea to keep the boy warm.