Part III Reading Comprehension ( 40 minutes) Section A Directions: In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices. Each choice in the bank is identified by a letter. Please mark the corresponding letter for each item on Answer Sheet 2 with a single line through the centre. You may not use any of the words in the bank more than once. A humid bathroom is the perfect habitat for mold. But there are ways to avoid it. "We can just open the window and let some fresh air in!" Not so easy on a space station though, as astrobiologist Petra Schwendner of the University of Edinburgh explains."It has been seen on the international space station or on the MIR(和平号) that these microorganisms can __26__. I've seen pictures where you could see this __27__ caused by bacteria or basically an accumulation of fungus behind wet towels."So as we set our sights on Mars, what might grow in the spacecraft—__28__ a human-scale petri dish—during the year-and-a-half-long flight? The Mars500 habitat in Moscow simulated that trip, with six crew members __29 __ inside. And Schwendner and her team tested microbial __30__ of the habitat over time. They found what you might expect: a lot of human-related bacteria and fungi, mostly at levels deemed safe for life in space. But they also noticed a __31__ in microbial diversity over time—which could indicate a less-than-healthy microbial community that's potentially more __32__ to takeover by hostile bacteria."Seeing this decrease basically is for us an important point or proof that __33__ monitoring is an important fact and is really required to basically maintain or be able to maintain a healthy environment." The study is in the journal Microbiome. When we do rocket to the Red Planet, it'll be impossible to keep our spacecraft completely __34__. Because humans are leaky animals. The real question might be how we'll keep our many microbes...from __35__ Mars.