unit 1 a land of diversity reading课时作业

I. 七选五

　　根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

　　Scientists are busy developing recipes that can be prepared on long voyages to far-off planets. These dishes really will be out of this world ― all the ingredients (原料)will be grown in space!

　　Until now, astronauts have loaded aboard their spacecraft everything that they might need, including enough ＂Earth food＂ to last for their entire trip. Those yucky tubes of liquid meals that fed our first space travellers are history. Today's astronauts choose carefully from a menu of more than a hundred varieties of dried meals to take along. By injecting hot water into the special packages, they can produce delicious food in space.

　　Packing food for a mission of several days or several weeks is one thing. Stocking up for a trip to Mars is quite another. One round trip will take four years. Astronauts with their sights set on long-distance space exploration will have no choice - they will have to grow their own food along the way.

　　If space farming seems unusual to you, it will be even more unusual for the ＂astroplants＂ that will accompany space missions in the future. These plants will have to grow without dirt, sunlight, or gravity. And nothing will be wasted. In specially designed growth chambers aboard the spacecraft, special lamps will provide just the right artificial light for plants to grow, using recycled nutrients and water.

　　Space farming will be more and more important the farther we go as we explore the universe. As the view of our planet grows smaller in the distance, certain reminders of Earth food aboard will become more and more treasured ― small stashes of cheese, coffee, and chocolate. And a few Mars bars, perhaps?

1. What does this passage mainly tell us?

　A.The food astronauts eat in space.

　B. Growing food in space.

　C. The difficulties astronauts meet with in space.

　D. How to store food in space.

2. Today's astronauts ___________.

　A. take more than 100 varieties of food with them

　B. have liquid meals every day

　C. can produce nice meals themselves

D. can eat whatever they like in space