考研英语二（完形填空）模拟试卷116
完型填空
A candlelit dinner works wonders for romance. Now scientists say it could also be good for your heart. Breathing in candle smoke causes beneficial【C1】______in your heart rhythm, they claim. It is thought that tiny salt particles released when the candle burns are【C2】______the effect
The researchers monitored the hearts of 13 men and women as they breathed in air【C3】______into a small chamber. In some【C4】______the air included smoke from candles in a second room. The volunteers didn\’t know which type of air they were breathing, but when it included candle smoke, their heart rate variability【C5】______.
Everyone\’s heart rate varies【C6】______all the time, beating a little bit faster when we breathe in than when we breathe out This is perfectly healthy and a sign that the brain is【C7】______and able to regulate the heart But this variation【C8】______as we get older and if we【C9】______heart problems. In the study, it was increased by【C10】______candle smoke.
Researcher Christina Isaxon said the concentration of smoke【C11】______during the study was similar to that created by a candlelit dinner. As the volunteers could not see the candles and weren\’t told what they were breathing, the effect could not be explained【C12】______by the calming effect of candlelight.
Dr Isaxon believed that tiny particles of the candle smoke could be responsible for the beneficial effects. These particles are【C13】______regulating the heart\’s rhythm and in sending messages between cells in the body. More salts are produced when a【C14】______is still. The study did not find any【C15】______health effects of the smoke—【C16】______she admitted she did not \’make a huge effort\’ to find any.
Soot, black powder in the smoke, from lit candles has been【C17】______health problems in the past. The American Chemical Society has warned that common wax candles release【C18】______harmful chemicals linked to cancer and other illnessea It recommends using beeswax.
Dr Isaxon used candles made of a natural fat in her study. She recommended using candles that are as natural as possible and avoiding【C19】______and dyes as they may give off【C20】______chemicals when burned.
1.【C1】(B)
A. supports
B. changes
C. drives
D. spirits
解析：前一句说到烛光晚餐对心脏也有好处，可判断，吸人蜡烛燃烧产生的烟雾能给人们的心率带来有利的影响。B项changes“变化”代入后，搭配beneficial表明烛光晚餐可“改善”心率，呼应下文出现的“心率变异性会增高”的结论。
2.【C2】(A)
A. behind
B. to
C. among
D. with
解析：上文谈到蜡烛燃烧的烟雾有利于心率，空格句试着解释原因。空格后the effect是上句谈到的烟雾对心率的影响，A项behind与之搭配指“这一效果背后的原因”。
3.【C3】(B)
A. poured
B. pumped
C. blown
D. dumped
解析：句中空格处过去分词应表明研究者在监测志愿者的心脏时对受试者所呼吸的气体(air)所采取的措施。B项pumped“给……打气；用泵输送”代入后，可指研究者为控制实验环境往志愿者所在的小房间(a small chamber)里注入气体。
4.【C4】(D)
A. ways
B. areas
C. respe
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