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  3. 下面的短文有 15 处空白，请根据短文内容为每处空白确定 1 个最佳选项。 Smoking Can Increase Depressive Sympt...

下面的短文有 15 处空白，请根据短文内容为每处空白确定 1 个最佳选项。 Smoking Can Increase Depressive Sympt...

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问题 下面的短文有 15 处空白，请根据短文内容为每处空白确定 1 个最佳选项。
Smoking Can Increase Depressive Symptoms in Teens
While some teenagers may use cigarettes to “ self-medicate” （自我治疗） against the blues （忧郁）, scientists at the University of Toronto and the University of Montreal have found that smoking may actually __________ (1) depressive symptoms in some teens.
“This observational study is one of the few to examine the perceived ____________ (2) benefits of smoking among teens/' says lead researcher Michael Chaiton, a research associate at the Ontario Tobacco Research Unit of the University of Toronto. ________ (3) cigarettes may appear to have self-medicating effects or to improve mood, in the long ____________ (4) we found that teens who started to smoke reported higher depressive symptoms. ”
As part of the study, some 662 high school teenagers completed up to 20 questionnaires about their use of cigarettes to ____________ (5) mood. Secondary schools were selected to provide a mix of French and English participants, urban and rural schools,
and schools ____________ (6) in high, moderate and low socioeconomic neighbourhoods.
Participants were divided into three ____________ (7): never smokers ； smokers who did not use cigarettes to self-medicate, improve mood or physical ___________ (8); smokers who used cigarettes to self-medicate. Depressive symptoms were measured using a scale that asked how often participants felt too tired to do things; had ____________ (9) going to sleep or staying asleep; felt unhappy, sad, or depressed; felt hopeless about the future; felt anxious or tense; and worried too much about things.
‘‘Smokers who used cigarettes as mood ____________ (10) had higher risks of elevated （提升）depressive symptoms ___________ (11) teens who had never smoked,” says co-researcher Jennifer Oloughlin, a professor at the University of Montreal Department of Social and Preventive Medicine. “ Our study found that teen smokers who reported emotional benefits from smoking are ____________ (12) higher risk of developing depressive symptoms.
The ____________ (13) between depression and smoking exists ____________ (14) among teens that use cigarettes to feel better. “ It’s ____________ (15) to emphasize that depressive symptom scores were higher among teenagers who reported emotional benefits from smoking after they began to smoke,” says Dr. Chaiton.

(12)
选项 A at
B in
C about
D without
答案A
解析本句中at the risk of为一个词组，意为“有……风险”。答案为A。其余各选项不符合词组意思。
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