W: I just found the most useful device at that new outdoor store, a water purifier.
M: A water purifier You want to carry even more equipment with you on our hiking trips
W: If it’s lightweight and saves work, yes. And this one fits that description.
M: Really I bet it takes up a lot of room.
W: Not at all. It’s a straw. Much like the one you use to drink a soda or milkshake.
M: Really That is small.
W: Ya. It’s a plastic, and has a series of mineral and chemical filters that strain harmful microbes from water.
M: Yes. But how good a job can it do filtering the germs out of stagnant pond water or water from lake and streams
W: It’s fantastic. It makes the water entirely germ free.
M: But, what about salt or chemical pollutants that maybe in the water. Does it clean those out
W: No, it doesn’t remove salt and chemicals, but those are not really major concerns when we
A. In restaurants.
B. On camping trips.
C. In science laboratories.
D. On car trips.
I have always found country life most (76) . The city, a place for business is only to be visited; it is not an ideal place for (77) residence. People may say that the city can provide you with the best (78) life can offer.
Your friends are always (79) for an informal chat or an evening’s entertainment. The (80) exhibitions, films or plays are always within easy reach. Shopping, too, is always a pleasure. But what about the hustle and bustle of city life The city dweller neverhas a moment (81) peace; he is always (82) . And what about the noise and pollution of the city Day and night the city is in uproar with its unceasing traffic. The air is polluted with poisonous gases emitted by the smokestacks of factories.
Country life is in many aspects (83) city life. For one thing, the people there are friendly. People are (84) with one another. You can never (85) receive a friendly nod
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