The majority of the people make tree houses using a pile of wood, a hammer, and some nails. Mitchell Joachim, an architect from the Massachusetts Institute of Technology, has a（n）_______ vision（设想）. He _______ a day when homes will be created from living trees.

Joachim’s vision is _______ on an idea called pleaching（编织）, where tree branches are grown so that they _______ weave together. Since the growth patterns of trees are _______ by wind and sunlight, it may be _______ to control the way a tree develops.

These Fabricated Tree House Habitats would use trees grown into shapes as housing. One of the _______ of these designs is that trees would not have to be cut down _______.

“A 100 percent tree house would _______ years to create,” Joachim said. __________ the climate, a house could take anywhere from 5 to 30 years to grow. Fortunately, there’s a way to speed up the __________. Joachim __________ including ecological materials such as grasses and living branches in the housing designs. “This material would be able to move __________ the house grows,” Joachim said.

A home would become an actual ecosystem, a community of plants, animals, and bacteria working together. The trees would also give off water vapor（蒸气）that would assist in __________ the homes. Solar panels and wind would help provide __________. The tree homes might even have soil pockets, where plants could __________ in the structure itself.

Work has already __________ on Joachim’s first design — a house made from 50 percent recycled and 50 percent living things. Joachim is confident about the __________ of his work, as he uses __________ products without destroying nature.

“The environment and its study are very important. We need to __________ nature, and don’t take it for granted,” he said.

With the rapid development of science and technology, online shopping has become popular with a lot of people, especially the youth.

   Having a roommate can be one of the best experiences in college or, easily, one of the worst. It all depends on whether you have a good relationship with your roommate or not. Follow the advice to avoid the common mistakes that turn good roommate relationships bad.

◇ 【小题1】

Communication is key. If something happens, sit down with your roommate and have a face-to-face conversation. I’ve seen roommate relationships fall apart because something happens and instead of talking to each other, the two start complaining about their roommates behind their backs. 【小题2】

◇ Don’t expect to be best friends.

Some roommates become the best friends, and some don’t. Don’t put pressure on yourself or your roommate, especially when you first meet. 【小题3】 And if your roommate doesn’t end up being your best friend, don’t worry.

◇ Ask before you take.

This applies (适用) to food, clothes and anything else. If you want to keep a relationship going, show your roommate that you have respect for what is his or hers by asking first. 【小题4】

◇ Clean up after yourself.

This should be done without saying. Don’t be lazy. Or, at least, don’t bury your roommate in your clothes and garbage. Most people I’ve come across in college are dirty and untidy. 【小题5】 But putting your stuff in order will help you avoid conflict.