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 interested 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】______ consequences. 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.

【C1】

A．believed

B．dreamed

C．assured

D．thought