How many percent of the people would be in favor of a shorter coffee-break and finishing earlier？
A．25%
B．30%
C．50%
D．55%

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 a rock avalanche move faster than other types of rockslides？
A．The rock moves over a layer of compressed air.
B．The rainfall is heavy where avalanches occur.
C．The rock breaks apart as it moves downslope.
D．The angle of the slope is almost vertical.

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.

Why are bacteria being used in the research study at the university？
A．Bacteria have unusual cell formations.
B．Bacteria live harmlessly on the skin.
C．Bacteria are similar to other life forms.
D．Bacteria cause many diseases in humans.

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.