Unit6 The Unexplained 一、单项选择 1．—What will the weather be like next Monday —It _____ be cloudy or windy. Who knows! A．might B．must C．should D．would 2．John will _____ go to France on vacation this summer. A．possible B．impossible C．probably D．probable 3．—Guess what Even Lucy, the top student in our class, made a mistake in the exam. —So she did. But no one is _____. A．possible B．natural C．perfect D．normal 4．Don’t be _____ in class. Be _____, please. A．noise; quiet B．noisy; quietly C．noisy; quiet D．noise; quietly 5．After listening to the soft music, Jill feels _____. A．relax B．relaxing C．relaxed D．to relax 6．My mother was cooking _____ my father was reading a newspaper at eight o’clock last night. A．while B．since C．before D．because 7．—I heard Frank would join the music club. —_____ He’s not interested in music at all. A．You’re kidding! B．Why not C．No problem. D．It’s up to you. 8．It usually takes us quite a long time to _____ master a skill. A．truly B．simply C．hardly D．probably 9．—A study shows that good habits play a very important _____ in children’s education. —I think so. A．sense B．part C．reason D．meaning 10．—Jack hasn’t taken his piano lessons for a long time. —He is considering _____ his piano course and spending more time on his study. A．to drop B．to throw C．dropping D．throwing 二、完形填空 Space suits don’t just make astronauts look cool. Without these special suits, astronauts wouldn’t be able to ____11____ their spaceship. That is to say, they wouldn’t be able to walk on the ____12____ or work outside the International Space Station. ★____13____ do astronauts need to wear space suits Space is a ____14____ place for human beings. Firstly, there is no air to breathe. Secondly, space also has high levels of radiation (辐射), energy that can pass ____15____ our bodies and make us sick. Thirdly, some parts are really ____16____ while other parts are very hot. So astronauts may die in just a few seconds if they stepped outside their spaceship without their suits. With a space suit, astronauts can move around in ____17____ for several hours. ★What can a space suit do for an astronaut Space suits keep astronauts safe inside. A backpack sends O2 in to let astronauts breathe ____18____. At the same time, the CO2 that astronauts breathe out is sucked (吸) away. The suit also ____19____ them from harmful radiation and fast-moving space dust. Under the space suit is another suit that looks like a pair of tight pajamas with little pipes running through them. Water runs through these pipes to ____20____ astronauts because wearing a space suit can make astronauts very hot! 11．A．leave B．live C．stay D．keep 12．A．sky B．earth C．moon D．sun 13．A．When B．What C．How D．Why 14．A．safe B．beautiful C．dark D．dangerous 15．A．in B．through C．across D．around 16．A．cold B．hot C．cool D．warm 17．A．room B．air C．space D．ship 18．A．quickly B．normally C．quietly D．possibly ... ...
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