某学生用量筒取液体时，量筒平稳地放置在实验台上，使视线与凹液面的最低点保持水平，读数为18mL；倒出部分液体后，俯视凹液面的最低处，读数为12mL，则该学生实际倒出的液体体积为（　　）

Brian：Hi, Cindy.____

Cindy：Hi, Brian. It is nice to see you and so many old classmates.

Brian：So it is.____

Cindy：You're right.  It's really a long time.

Brian：Did you see the old photos on the wall?

Cindy：I sure did.____

Brian：But those are some great memories.

Cindy：Hey ！____

Brian：Yes, it is. I remember he used to stay up all night studying.

Cindy：____

Brian：Yes. He was the only one left in the class when he woke up.

Cindy：That was really funny.

A. And then he would fall asleep in class.

B. Long time no see!

C. Who took these photos?

D. Isn't that John over there?

E. We looked so funny in them.

F.I can't believe it's been ten years.

G. Did he use to be short ?