补全对话从方框中选择最佳选项完成对话
a. Maybe light bulbs(灯泡) are the most useful inventions.
b. What kind of books do you want to borrow?
c. Great inventions have changed the world a lot.
d. Why do you think so?
e. What do you think the most useful invention is?
A: Where are you going, Tony?
B: The library. I want to borrow some books.
A:{#blank#}1{#/blank#}
B: About inventions. You know I have to prepare for the science lesson.
A:{#blank#}2{#/blank#} And we humans are really great.
B: That's true. People have made lots of inventions.
A:{#blank#}3{#/blank#}
B: Sorry, I'm not sure.{#blank#}4{#/blank#}
A: I don't agree. In my opinion, cars are the most useful.
B: {#blank#}5{#/blank#}
A: Because I can go anywhere quickly and conveniently in my car.
