【推荐1】Directions: After reading the passage below, fill in the blanks to make the passages coherent and grammatically correct. For the blanks with a given word, fill in each blank with the proper form of the given word; for the other blanks, use one word that best fits each blank.

Scientists and engineers     1     (prepare) for possible travel into interstellar space, the area in between stars, in the distant future. Experts believe it will likely take many years before the technology and equipment are developed     2     (send) humans to this unexplored area of space. But if it does happen, massive spaceships     3     carry humans on long trips to distant starts.

Two American researchers, Andrew McKenzie from the University of Kansas and Jeffrey Punske of Southern Illinois University, have explored one possible problem with such travel. They considered the possibility     4     changes in human language could develop over time, thus     5     (cause) major communication problems with people on Earth.

Languages naturally change as communities grow more isolated from each other, the researchers noted in the paper. The long isolation of a community could lead to enough differences in language to make     6     impossible for community members back home to understand. The researchers noted that in    7     (add) to new words being used, the language of people traveling on spaceships and living in colonies     8     (experience) many other changes. For example, the sounds of different letters would likely change over time, affecting not only individual words, but the whole grammatioal system.

The researchers say one possible solution to     9     (limit) communication problems would be to include language experts on spaceship crews. Another suggestion is to use sign language as a form of communication. McKenzie added that space travelers might question whether it is even worth trying to learn how to communicate with people on Earth. But he believe there will always be a need, even     10     it is very limited. “You have to learn a little Earth English to send messages back, or to read the instruction manuals and information that came with the ship,” he said.

【推荐3】阅读下面材料，在空白处填入1个适当的单词或括号内单词的正确形式。

Some scientists say there will not be enough land for Earth in the near future. So some other places should    1     (find) to live. While some scientists are considering     2     (build) communities on the Moon and Mars, other scientists feel independent space stations could bring many more     3     (benefit).

So what is wrong    4     the Moon or Mars? Firstly, the distances are a problem. The Moon is about 384,400 miles from Earth. Mars is over 55 million miles away. The journey to the Moon takes about eight days, and the one to Mars takes from six to eight months. It will be both time-consuming and    5     (danger) to get settlers to these distant places. Moreover, it takes a message up to 44 minutes to go from Earth to Mars,     6     makes fast communication impossible. However,     7     space station circling Earth is just a few hours away. This makes the trip much cheaper and communication    8     (relative) easy. Furthermore, the    9     (absent) of light at night on the Moon and Mars isn’t a good thing either. On a space station, however, the sun’s energy can be made available     10     (support) people living there 24 hours a day.