57. Doctors suggest that people should wash their hands .
(A). twice a day
(B). three times a day
(C). four times a day
(D). eight times a day

33. It’s said that the power plant is now large as what it was. (A). twice as (B). as twice (C). twice much (D). much twice

34. It be the vocabulary that caused you the problem in the exercise because you know a lot of words. (A). may (B). couldn’t (C). should (D). needn’t

35,----How did your interview with the manager go? ---- He seemed interested in my experience, but he didn’t ask for references. (A). Perfect! (B). I’m not sure. (C). That’s right. (D). Couldn’t be better.

56. Tht Healthy Habits Survey（调查）shows that only about one third of American seniors have correct habits. Here are some findings and expert advice. 1.How many times did you brush your teeth yesterday? ·Finding：A full 33% of seniors brush their teeth only once a day. ·Step：Remove the 300 types of bacteria in your mouth each morning with a battery-operated toothbrush. Brush gently for 2 minutes, at least twice a day. 2.How many times did you wash your hands or bathe yesterday? ·Finding：Seniors, on average, bathe fewer than 3 days a week. And nearly 30%wash their hands only 4 times a day-half of the number doctors recommend. ·Step：We touch our faces around 3,000 times a day-often inviting germs（病菌）to enter our mouth, nose, and eyes.Use toilet paper to avoid touching the door handle. And, most important, wash your hands often with hot running water and soap for 20 seconds. 3. How often do you thind about fighting germs? ·Finding：Seniors are not fighting germs as well as they should. ·Step：Be aware of germs. Do you know it is not your toilet but your kitchen sponge（海绵）that can carry more germs than anything else? To kill these germs, keep your sponge in the microwave for 10 seconds. What is found out American seniors? (A). Most of then have good habits. (B). Nearly 30%of then bathe three days a week . (C). All of then are fighting germs better than expected . (D). About one third of them brush their teeth only once a day

58.Which of the following is true according to the text ? (A). We should keep from touching our faces . (B). There are less than 300 types of bacteria in the mouth . (C)．A kitchen sponge can carry more germs than a toilet . (D). We should wash our hands before touching a door handle .

59. The text probably comes from . (A). a guide book (B). a popular magazine (C). a book review (D) .an official document

60. Using too much water or throwing rubbish into our rivers are clear ways that humans can Put our water supply in danger ,but we also affect our water supply in less obvious ways . You may wonder how paving(铺砌) a road can lead to less useable fresh water . A major Part of the water we use every day is groundwater . Groundwater does not come from lakes or rivers .It come from underground . The more roads and parking lots we pave ,the less water can Flow into the ground to become groundwater . Human activity is not responsible for all water shortages(短缺). Driver climates are of course more likely to have droughts(干旱) than areas with more rainfall ,but in any case, good management can help to make sure there is enough water to meet our basic needs . Thinking about the way we use water every day can make a big difference ,too In the United States ,a family of four can use 1.5tons of water a day ! This shows how much we depend on water to live ,but there’s a lot we can do to lower the number . You can take steps to save water in your home .To start with ,use the same glass for your drinking water all day .Wash it only once a day .Run your dishwasher (洗碗机)only when it is full 。Help your parents fix any leaks in your home . You can even help to keep our water supply clean by recycling batteries instead of throwing them away . Which of the following is most likely to lead to less groundwater ? (A). Using river water . (B) .Throwing batteries away . (C). paving parking lots . (D). Throwing rubbish into lakes .

61. What can be inferred from the text ? (A). All water shortages are due to human behavior . (B). It takes a lot of effort to meet our water needs . (C). There is much we can do to reduce family size . (D). The average family in America makes proper use of water .

62. The last paragraph is intended to . (A). show us how to fix leaks at home (B). tell us how to run a dishwasher (C). prove what drinking glass is best for us (D). suggest what we do to save water at home

63. The text is mainly about . (A). Why paving roads reduces our water (B). how much we depend on water to live (C). why droughts occur more in dry climates (D). how human activity affects our water supply