D．important

　　答案　B　[这里的activities指的是下文所列举的事情：Marvin想尝试一下大麻的滋味，Alisa因为宿醉而逃课，Merriam的新男友是街上的一个小混混。由此可以看出，这些事情都是很危险的(dangerous)。]

　　18．A.actions

　　B．lessons

　　C．words

　　D．thoughts

　　答案　A　[由语境可知，该空指的是上文提到的各项不良行为，所以用actions。]

　　19．A.force

　　B．threaten

　　C．persuade

　　D．cheat

　　答案　B　[force强迫；persuade说服；cheat欺骗。根据语境可知选threaten威胁。]

　　20．A.friends

　　B．girlfriends

　　C．classmates

　　D．brothers

　　答案　A　[由语境可知文章一直在谈友谊，所以应该选择friends。]

　　Ⅴ.阅读理解

　　As prices and building costs keep rising，the “doityourself”(DIY)trend(趋势)in the U．S.continues to grow.

　　“We needed furniture for our living room，”says John Ross，“and we just didn't have enough money to buy it.So we decided to try making a few tables and chairs.”John got married six months ago，and like many young people these days，they are struggling to make a home at a time when the cost of living is very high.The Rosses took a 2week course(课程)for $280 at a night school.Now they build all their furniture and make repairs around the house.

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