Unit 2 课时跟踪检测(3) 阅读写作融会练（word练习）-【新课程学案】新教材2023-2024学年高中英语选择性必修第四册（人教版2019）

UNIT 2 课时跟踪检测（三） 阅读写作融会练 Ⅰ.阅读理解 It's a good thing that sloths (树懒) don't have to go to school.They'd never make it on time.These sleepy tree-inhabitants sleep up to 20 hours a day！And even when they are awake，they barely move at all.In fact，they are very slow，and algae(藻类) actually grows on their fur. Sloths live in the tropical forests of Central and South America.With their long arms and hairy fur，they look like monkeys，but they are actually related to anteaters(食蚁兽). They can be 2 to 2.5 feet long and weigh from 8 to 17 pounds, depending on species. There are two main species of sloth, identified by whether they have two or three claws on their front feet.The two species are quite similar in appearance, with roundish heads, sad-looking eyes，tiny ears，and short tails.Two-toed sloths are slightly bigger and tend to spend more time hanging upside down than their three-toed cousins，who will often sit upright in the fork of a tree branch.Three-toed sloths have facial coloring that makes them look like they're always smiling.They also have two extra neck vertebrae that allow them to turn their heads almost all the way around! Some scientists think sloths developed their slow-motion lifestyle so they would be less noticeable to hunters such as hawks and cats，which rely heavily on their eyesight when hunting.The algae that grows on sloths' fur also helps them avoid hunters by letting them mix in with green leaves.They rarely come down from the trees. About once every week, they go down to go to the bathroom，slowly moving about by digging their front claws into the dirt and dragging their bodies. If they are caught by hunters, sloths will become aggressive, biting fiercely, striking with their claws，and screaming. 1．Who is related to sloths? A．The monkey. B．The anteater. C．The hawk. D．The cat. 解析：选B　细节理解题。根据第二段中的“Sloths live in the ... actually related to anteaters(食蚁兽)．”可知，食蚁兽和树懒有关系。故选B项。 2．How are sloths mainly classified? A．By their arms. B．By their heads. C．By their