Which sentence below best expresses the essential information in the highlighted sentence in paragraph 5？ Incorrect choices change the meaning in important ways or leave out essential information.
A．Fire has destroyed much of the original vegetation, so mudflows are now more likely.
B．More damage to vegetation is caused by brush fires than by any other natural event.
C．It is necessary to remove dead and damaged vegetation after a mudflow but not after a fire.
D．Fires occur frequently in areas where the vegetation has been cleared for development.

听力原文：We're going to look around the city tomorrow morning.
4
A．I'll try my best to do it.
B．I'm looking forward to that.
C．I feel a little cold in the morning.
D．I haven't eaten my breakfast yet.

Which two characteristics are common in bacteria？ Click on 2 answer choices.
A．They have one cell.
B．They are harmful to humans.
C．They reproduce quickly.
D．They die when exposed to air.

What is the lecture mainly about？
A．Provisions of the Homestead Act
B．How to construct a log cabin
C．Frontier homes in the West
D．Early construction materials

Why does the professor say this:
A．He is showing the students some slides.
B．He does not want the students to ask questions.
C．He wants the students to pay attention.
D．He thinks that the information is very clear.

A．It was cold.
B．It was a failure.
C．I'm very happy.
D．She is shy enough.