Marijuana(大麻) use among college students is on the rise in the United States. Studies of American college students show that daily marijuana use was more popular than cigarette smoking for the first time last year.

Studies found that 5.9 percent of college students said they use marijuana nearly every day. Students have smoked at least 20 times in the earlier 30 days. That is a 3.5 percent increase from 2007, and the highest rate since 1980. Only five percent of college students reported using tobacco(烟草) daily. More students are experimenting with the drug for the first time, as well.

Twenty-one percent of students reported having used marijuana once or more in the earlier 30 days. That is a 4 percent increase from 2006. Thirty-four percent of those questioned said they used marijuana in the earlier year, four percent more than in 2006. However, the levels appear to have leveled off(平稳) since 2014.

Lloyd Johnston was the lead researcher. He said, “It’s clear that for the past seven or eight years there has been an increase in marijuana use among the nation’s college students. And this largely parallels(同步) an increase we have been seeing among high school seniors.”

Mr. Johnston said the main driver for the increased use of marijuana is the belief that it is not as dangerous as tobacco. He pointed to studies of high school graduates between the ages of 19 and 22. In 2006, 55 percent of those questioned said regular use of marijuana was dangerous. Eight years later, that number dropped to 35 percent.

He said this is probably a result of increased legalization of medical and recreational(娱乐的) marijuana use. It is legal to use marijuana for recreational purposes in four U.S. states and three U.S. cities. Twelve other states have legalized marijuana for medical purposes.

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1.The highest rate of college students using marijuana is in _________.

A 1980

B 2022

C 2007

D 2006

解析：选B。B 细节理解题。根据第二段可知，现在美国大学 生中大麻吸食比例是 5.9%，这是自 1980 以来最 高的。故选 B。

2.What is the percentage of people questioned used marijuana in the early year in 2006?

A 34%.

B 30%.

C 21%.

D 17%.

解析：选B。B 数字计算题。根据第三段“Thirty-four percent of those questioned said they used marijuana in the earlier year, four percent more than in 2006.”可知 34%的被调查者说他们在早些年吸食过大麻，这 比 2006 年增加了 4%，即 2006 年约 30%的人在早些年吸食过大麻。故选 B。

3.There was an increase of using marijuana in the following groups EXCEPT _________.

A national colleges

B senior high schools

C junior schools

D American colleges

解析：选C。C 推理判断题。根据第四段可知，此次研究还对 美国高中生吸食大麻的情况进行了调查，美国高 中生吸食大麻人数的增长比例与大学生吸食大 麻人数的增长比例是相同的，只有初中生没有提 及。故选 C。

4.What does the underlined word “driver” in paragraph 5 mean?

A 驾驶员

B 马车夫

C 驱动器

D 驱动因素

解析：选D。D 词义猜测题。这里的 driver 应为造成美国大学 生吸食大麻人数增长的“驱动因素”。故选 D。