2. 外语
  3. When Laura Langanki found extra towels in the laundry smelling lemony fresh, she never【C1】______ that meant her 13-year-old son

When Laura Langanki found extra towels in the laundry smelling lemony fresh, she never【C1】______ that meant her 13-year-old son

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问题      When Laura Langanki found extra towels in the laundry smelling lemony fresh, she never【C1】______ that meant her 13-year-old son was【C2】______ drugs. "We were【C3】______ three to four bottles of air freshener a week," says the 42-year-old nurse from Plymouth, Minn. "【C4】______ a fool, I thought my kid was becoming more nterested in personal【C5】______ "Instead, Jake was "huffing"--spraying the【C6】______ into towels and inhaling the fumes.【C7】______ his mother found out two years later, he was smoking pot, using acid and crystal met amphetamine, drinking alcohol, and snorting cocaine.
     Laura had warned Jake not to【C8】______ illegal drugs when he was younger and felt sure he got the message. But according to a new U.S. News【C9】______ , even parents who believe they talk often with their kids about drugs can be【C10】______ . Of 700 parents and 700 teens surveyed, 1【C11】______ 3 parents claimed to talk about drugs "a lot" with his or her teen, while only 14 percent of teenagers felt they had frequent conversation on the【C12】______ with Mom or Dad.
     That failure to communicate can have【C13】______ con sequences. In a 1999 survey of nearly 10, 000 parents and teens【C14】______ the Partnership for a Drug-Free America, teens who【C15】______  anti-drug messages at home were 42 percent 【C16】______ to use drugs. "This may sound like【C17】______ advice," says Steve Dnistrian, executive vice president of the group. "But hard numbers quantify that parental communication is the  【C18】______ most important thing we can do to prevent children using drugs." Indeed, parents received 【C19】______ vote of confidence from 63 percent of the teens polled by U.S. News,【C20】______  siblings, teachers, and friends.
【C7】
选项 A、As
B、Since
C、By the time
D、Unless
答案C
解析 此题考查名词用法。从这里所谈的内容可以看出，到妈妈发现孩子吸毒的时候，问题已经很严重了： smoking pot，using acid and crystal met amphetamine，drinking alcohol，and snorting cocaine。所以这里应该选择表示一段时间的状语by the time。
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