ÌâÄ¿ÄÚÈÝ
¡¡¡¡How can you fill a balloon with air without blowing it up? Read these steps.
¡¡¡¡1£®Get a balloon, an empty soda-pop bottle, some baking soda, and some vinegar (´×).
¡¡¡¡2£®Put two teaspoons of baking soda into a balloon.
¡¡¡¡3£®Pour one inch of vinegar into the empty bottle.
¡¡¡¡4£®Put the neck of the balloon tightly over the neck of the bottle.
¡¡¡¡5£®Shake the bottle so that the baking soda will fall in.
¡¡¡¡6£®In a few minutes, the balloon will begin to fill with air.
¡¡¡¡7£®The baking soda and the vinegar mix together to form a gas. This gas fills the balloon.
1£®Which step has a list of four things to use?
[¡¡¡¡]
2£®Where do you put the baking soda?
[¡¡¡¡]
3£®How much vinegar should you use?
[¡¡¡¡]
4£®When do you shake the bottle?
[¡¡¡¡]
5£®The baking soda and vinegar mix together to make ________ .
[¡¡¡¡]
As we all know, the environment around us is getting worse and worse. In some places we can¡¯t see fish ¡¡26 in the river or trees on the hills. Some people even have no clean water to drink.
Recently, a new lifestyle called low carbon life is ¡¡27 every comer of our country. The meanings of low carbon are ¡¡28 energy and no waste. It is such an important project that I can¡¯t wait 29 my ideas on how to promote it.
First£¬we should ¡¡30 a no-car day every week in our school. Because cars not only cause serious air pollution but also waste energy. ¡¡31 the no-car day, neither students ¡¡32 teachers are allowed to drive to school. At the same time£¬just walk or run. Use our ¡¡33 and enjoy the fun.
Second, we had better not use plastic bags ¡¡34 . No one can stand the ¡°white pollution¡±£¬ ¡¡35 it is wise to use cloth bags which can ¡¡36 again and again.
37 £¬one thing ¡¡38 we should keep in mind is that every big thing comes from the small details. So, as students, we ought to turn ¡¡39 the lights the moment we leave, use 40 sides of the paper, and reuse our textbooks and so on.
All in all, it weighs greatly for all of us to put the low carbon lifestyle into practice. Just set our mind to these£ºno-car days, no plastic bags, and no waste. Let¡¯s do it now.
26. A. swims¡¡¡¡¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. swimming¡¡¡¡¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. to swim ¡¡¡¡¡¡D. swam
27. A. spreading¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. moving ¡¡C. living¡¡¡¡ ¡¡D. becoming
28. A. below¡¡¡¡¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. high¡¡¡¡¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. above¡¡¡¡ D. low
29. A. to express ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. express ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. expressing¡¡¡¡D. expressed
30. A. set off¡¡¡¡¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. set up¡¡¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. put on¡¡ ¡¡¡¡¡¡D. put down
31. A. in¡¡¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. at ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. on ¡¡¡¡ D. with
32. A. nor¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. or ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. both¡¡¡¡¡¡ D. and
33. A. foot ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ ¡¡ B. cars ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. buses¡¡¡¡ ¡¡D. legs
34. A. any more¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. no more ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. no longer¡¡¡¡ D. never
35. A. because¡¡¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. so ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. but¡¡¡¡¡¡¡¡ ¡¡D. although
36. A. reused¡¡¡¡¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. be used ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. is used¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. use
37. A. Finally¡¡¡¡¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. Final¡¡¡¡¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. Last¡¡¡¡¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. Lately
38. A. who ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. what¡¡¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. that¡¡¡¡¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. whose
39. A. up¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. down¡¡¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. on D. off
40. A. both ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B. each¡¡¡¡¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ C. every¡¡¡¡ ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ D. all