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.

听力原文：Of the students participating in our university's research project, 73% classified themselves as freshmen and sophomores.
（23)
A．Many university students prefer soft drinks to fresh fruits.
B．Most of them are first-or-second year college students.
C．A number of college students refuse to disclose their identities.
D．Not many students are interested in our research projects.

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

Where would this passage most likely appear？
A．In a magazine specifically for women.
B．In a restaurant and hotel guide.
C．In a news magazine.
D．In a journal for top-ranking businessmen and women.

听力原文：Most people I know are interested in the proposed tax reform. being debated in the congress, because they hope it will lower taxes for them.
（25)
A．Most of them are from low-income belies.
B．Most of them are in favor of a tax cut.
C．I know the Congress will veto the tax reform.
D．I propose the tax reform. be debated in the Congress.

听力原文：Originally we had planned to buy a car by the end of last year, but then with the recent fluctuation of the crude oil prices, we decided to postpone the purchase.
（24)
A．We decided to sell the car when the oil Prices rose.
B．We should not delay solving the problem of oil prices.
C．We were at a loss as to whether to buy that expensive car or not.
D．We didn't buy a car because of the floating oil prices.