把对话补充完整。
A：Hello! I'm John. What's your name?
B:____
A: Where are you from?
B:____
A: How old are you?
B.____
A: Look! ____.Today is my birthday. Have some cake, please!
B:____  Thank you!
A: ____. Let's eat the cake.
B: OK!

A. I'm from the USA.    B. My name is Amy. C. You're welcome.      D.I am six years old. E. Happy birthday!        F. I have a big cake.

______more effectively with foreign firms, many Chinese firms have turned to new technology．

我国哲学家张载认为，气是万物的本原，一切有形象的东西本质上都是气。与这种观点根本对立的是（  ）

— I haven't heard ______ Peter yet.

— Don't worry. No news is good news. His letter will arrive soon.

下列有关突触的叙述中，正确的是：（   ）