About 420 million (百万) years ago, mushrooms5 grew taller than giraffes. ……

use today. Why do we need to do this? Well, if we want to build houses on Mars, we need lots... of such bricks in just two years. Later they can build bigger houses for more astronauts to go ……

. They have some new uses (用途)! Scientists are trying to use mushrooms to build houses. They are better than... new uses (用途)! Scientists are trying to use mushrooms to build houses. They are better than common ……

to us.2. We can use sand to build h______ and r________ and make i________.3. Sand is s_______.... But we are using sand too fast. One day, we may have no sand left to use.Many uses of sand:Build ……

to build houses for us, instead we have to work hard to earn money. And to some extent its... an impact on the whole of society. We no longer rely on the government to build houses for us ……

houses. C. The bricks will be too soft to build houses. D. There will be no carbon dioxide...;  4. Why can cow dung help make houses water-resistant?4. Why can cow dung help make houses ……

, according to The Guardian. The Netherlands is the first country to build such houses.Scientists plan to build five houses with 3-D printers. The first house will be finished in 2019. ……

various jobs to do4. From the story, we can see that _____.A. country houses have changedB. life... in England4. From the story, we can see that _____.A. country houses have changedB. life in country houses ……

在太空里建造充气“房子”在太空里建造充气“房子”How can we live on the moon or Mars one day? A US company has an idea...” will open up by themselves. How can we live on the moon or Mars one day? A US company has an ……

DO houses have legs? Tujia and Miao people’s houses do! In Zhangjiajie area, there arewooden(木质的) houses with four "legs". These houses stand on four woodenpoles(柱子).Sometimes two of them stand ……

).But why do the Tujia people build houses in the air? Well, it has something to do with (与……有关) where.... Also, higher houses can protect people from floods (洪水) and dangerous animals, such as snakes ……

changed it into a house.Why did people build country houses? Probably because they wanted other..., people changed it into a house.Why did people build country houses? Probably because they wanted other ……

walls. A few even had their own fruit trees. No two houses looked the same!Then we arrived at a plot... trees. No two houses looked the same!Then we arrived at a plot of land. A volunteer-based company owns ……

阅读文章，判断正误。 All ants should look for food and build houses. ( ) Arctic terns fly twice a year. ( ) Beavers like to build their houses under water. ( )Answers: 1. F 2. T 3. F ……

?a. They are cheaper to build than normal houses.b. They are environmentally friendly.c. The houses can be moved  ...?a. They are cheaper to build than normal houses.b. They are environmentally friendly.c. The houses can be moved ……