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1、七年级下册 Units 13一、完成句子根据所给汉语句子完成英语句子，词数不限。1她积极参加对这些贫困孩子的教学工作。_2玛丽正在找她的自行车。_3他多次打电话却没有人接听。_4你对你最终的决定有把握吗？_二、阅读理解Many people dream of traveling into outer space. However, spending too much time in space may cause health problems, according to NASA. Thats why astronauts shouldnt spend more than six month
2、s on the International Space Station(ISS)at a time. Muscle(肌肉) and bone lossIn a weightless environment, astronauts dont need to use their muscles to support themselves, so their muscles start shrinking. To keep their muscles strong, astronauts need to exercise about 2 hours each day on the ISS. Sle
3、ep disorder(混乱)In space, the sun rises every 90 minutes. It is hard for astronauts to get used to this lightdark cycle when they sleep. Also, they need to sleep in a sleeping bag that is fixed to a wall, and it is uncomfortable. Astronauts now have individual sleeping pods(分离舱) that help shut out so
4、me of the light. Still, studies have found that most astronauts only sleep about six hours each night, even though they should have eight and a half hours. Brain changesScientists have found that the position of the brain changes during spaceflight. It can affect how the brain deal with how we see,
5、stay balanced and move around. Thats why some astronauts cant control their movement and balance after returning to the Earth. Scientists have also found that astronauts may get used to this change after going on more spaceflights. But they still need to do more research. 1According to the passage,
6、astronauts may have the following health problems EXCEPT _Aheadache Bbrain changes Csleep disorder2Astronauts may have muscle problems after returning to the Earth because _Athey seldom walk while in spaceBthey are too busy to exercise in spaceCthey dont need to use their muscles to support themselv
7、es in space3Astronauts sleep in individual sleeping pods to _Astay warm at night Bshut out lightCenjoy a quiet place 4The underlined word “shrinking” in the second paragraph means “_”A萎缩 B改变 C消失 5The best title of this passage is “_”ASleep disorder in space BBrain changes in spaceCHealth problems in space参考答案【习题清单过达标关】 一、1.She plays an active part in teaching these poor children.2Mary is looking for her bike.3He called over and over again but nobody answered.4Are you sure about your final decision?二、ACBAC