单项选择题

Passage 1
Questions 11 and 12 are based on the passage you have just heard.
Why do most solid objects melt if they get hot enough（）

A．It is the effect of the heat on the objects atoms.
B．They move out of their usual places.
C．Its atoms move too fast.
D．Atoms hold together and give the object its shape.

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What is the man's opinion（）

A．Steve looks good in anything.
B．He knew someone who looked like Steve.
C．He wishes he had a tie like Steve’s.
D．Steve should wear the old tie.

单项选择题

The best title for this passage would be（）.

A．American Manned Lunar-space Program
B．NASA’s Space Program
C．Apollo Program
D．Space Competition between U.S. and Soviet Union

Passage 1 Questions 11 and 12 are based on the passage you have just heard. Why do most solid objects melt if they get hot enough（） 您的浏览器不支持 audio 元素。

Passage 1
Questions 11 and 12 are based on the passage you have just heard.
Why do most solid objects melt if they get hot enough（）