B. I'm crazy about it!

C. And I just love this screen.

D. Wow, it sure looks great.    

E. Isn't it wonderful?

Alice: What are you unboxing, David?

David: It's my new smartphone. ______1______

Alice: __________2_________

David: It works great, too. It has a high-quality camera, and it's a videophone.  

The keyboard is easy to use and even a child can use it.

Alice: Yeah, but a child couldn't afford the high price, right?

David: True enough,but this one is cheaper than most othermodels._______3____ The colours are so real! And you can download tons of things onto it.

Alice: ___________4______________

David: Are you serious? ___________5___________

A: Look! ________1_______ lt looks so interesting. There  are  dragons and toads（蟾蜍）on it.

B: Ah, it's a great invention of ancient China.

A: Really? __________2__________.

B: Yes. It was invented in the Han Dynasty.

A: __________3__________

B: It was invented by Zhang Heng.

A: __________4___________B: Guess!

A: Was it used for holding water?

B: No. __________5_____________.

A: Testing earthquakes? Wow, it's really amazing!