When the atoms of an object leave their usual places, we say that the object is ______ .
A. becoming smaller
B. becoming hotter
C. changing places
D. melting
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听力原文：Hello, may I make an appointment with Professor Jones？
(5)
A. Yes, you may.
B. How about tomorrow morning？
C. I'm glad to hear that.
D. I'm free this afternoon.
听力原文：W: Oh, your poor arm, what happened？
M: I broke it when I was playing football.
Q: What happened to the man？
(8)
A. He broke his arm.
B. He broke his leg.
C. He broke his foot.
D. He broke his football.
Atoms are like bricks because ______ .
A. atoms are made up of bricks
B. atoms are made of everything
C. they are the same in size
D. everything is made of atoms
A multi-stage rocket refers to ______ .
A. several rockets which are separated from each other
B. a single rocket with enough fuel
C. the booster which is the biggest and can lift the whole rocket from the ground
D. a rocket with several parts, and each of which can help to push the spaceship into the space
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