Unit 1 Great scientists Language points课时作业

完形填空

　　(2019·太原二模)On July 24, 1916, a natural gas explosion trapped 32 men working in a tunnel 250 feet below Lake Erie. The first rescuers who entered the tunnel were __1__ by gas, and for hours no one else dared to enter the suffocating(使人窒息的), __2__ deathtrap.

　　Then, late that night, someone had an idea: __3__ Garrett Morgan and his new invention. Garrett Morgan was a successful __4__ owner in Cleveland. The son of freed slaves and the seventh of 11 children, mechanically minded Morgan had opened his own sewing machine shop, which he soon __5__ to a tailoring factory with 32 employees.

　　In the early 1900s, factory buildings were crowded and untidy. They were often __6__ of wood, with no fire escapes. Fire could cause serious __7__. Concerned about his employees, Morgan __8__ with a "safety hood(面罩)" that would allow the wearer to __9__ despite a fire's poisonous smoke.

　　Morgan knew smoke rises during a fire. __10__， he created a heat­resistant hood with a long tube reaching to the floor. Wearing Morgan's hood, a firefighter could breathe the __11__ air near the __12__. Morgan lined the breathing tube with a sponge­like material that was wetted before use to __13__ the air. A second tube was designed to __14__ exhaled(呼出的) air.

　　Called to the scene on the night of the tunnel explosion, Garrett arrived with samples of his safety hood. Still in their nightwear, he and his brother Frank put on the hoods and __15__ entered the tunnel. It was a dangerous __16__ of the invention, but they saved two lives and __17__ four bodies before officials closed the __18__. Morgan knew that more lives might have been saved if he had been called sooner.

　　The daring __19__ made Morgan famous and brought requests for safety hoods from fire departments around the country. But his greatest __20__ was knowing that his invention would save more people.

　　【解题导语】　本文是一篇夹叙夹议文。Lake Erie地区的天然气爆炸，导致32名隧道员工被困，由于有毒烟雾，最初的救援行动失败后没有人敢再进入隧道施救；有人请来了Garrett Morgan，一个安全面罩的发明者，他和他的弟弟戴上面罩勇敢地进入隧道，挽救了两条人命。这次救援行动使得Garrett Morgan声名远播，他的发明将挽救更多人的生命。

　　1．A.lit　　　 B．powered

　　C．overcome D．overheated

C　解析：根据该句中"and for hours no one else dared to enter...deathtrap"可知，有几个小时没有其他人敢进入隧道；结合该句"The first rescuers who entered the tunnel were ______ by