Chemists for Clean Water

　　At reservoirs in Bangladesh, chemists arehard at work purifying local water supplies. These experts use filters toremove arsenic from the reservoirs, creating a potable water supply for nearbyresidents. Many of these experts are affiliated with 1 ChemistsWithout Borders (CWB). CWB is an organization that provides assistancefor crucial human health issues such as clean water. Operating not only in Bangladeshbut also in the United States and other nations, CWB relies on the efforts oftrained, professional chemists, as well as those of 2 volunteers’ interestedin entering the field.

　　Professional chemists at CWB seek outprojects that can provide help directly to populations in need. Their workin 3 Bangladeshinvolves removing toxins, from the drinking water, primarily throughwater purification. CWB staff members create and give arsenic testing kits toBangladeshi locals and work with interpreters to 4 dissipate informationand instructions. 5 CWB also provides education about medicine,vaccines, and environmental sustainability.

　　6 CWB also works with volunteers who arerigorously trained chemists. While some volunteers are concernedcitizens who want to assist with public education 7 campaigns. Others hold actualchemistry training. The education background for water chemists is varied butincludes many disciplines, including microbiology and geology. Students explorethese related fields to develop a more comprehensive view of the variables thataffect water quality. 8 They might study, for example, the microorganismsliving in water, or the effects of particular rocks and soil on water supplies. Volunteerswith a rich background in chemistry also help the CWB professionals with watertesting and supply kit creation. This practical experience is an excellentopportunity for prospective water chemists to gain insights into what the jobentails.

　　9 A career in water chemistry leading toexciting travel and teaching opportunities, and working to de-contaminate watersupplies around the world is a rewarding experience for those who undertake it.Also worth noting is the fact that demand for skilled water chemists 10 are onthe rise. According to the US Bureau of Labor Statistics, the number of jobs inthis field is expected to grow 8 percent by 2022. 11 Looking beyond that, theneed for water chemists will likely continue to grow to meet the increasingwater demands of our burgeoning global population.

　　1 Which choice most effectively combinesthe sentences at the underlined portion?

　　Chemists Without Borders (CWB);this is an

　　Chemists Without Borders (CWB),an

　　an organization, which iscalled Chemists Without Borders (CWB) and is an

　　an

　　2

　　NO CHANGE

　　volunteer’s

　　volunteers

　　volunteers’s

　　3

　　NO CHANGE

　　Bangladesh, involves removingtoxins, from the drinking water

　　Bangladesh, involves removingtoxins from the drinking water,

　　Bangladesh involves removingtoxins from the drinking water,

　　4

　　NO CHANGE

　　disseminate

　　proliferate

　　propagate

　　5 At this point, the writer wants toelaborate on the information in the preceding sentence by providing additional,relevant details. Which choice best accomplishes this goal?

　　These kits include a hand-helddevice that allows users to identify arsenic concentrations in the water;arsenic is then removed using a filtration system.

　　Arsenic is a metalloid that isoften used for strengthening metal alloys that include copper and lead.

　　Another important area ofeducation is vaccines; people living in Bangladesh have access to vaccines butoften do not receive them.

　　Some of the CWB representativesare fluent in Bengali, the official language of Bangladesh.

　　6 Which choice provides the most effectiveintroduction to the main topic of the paragraph?

　　NO CHANGE

　　Trained professionals provideinvaluable resources to the water chemistry field.

　　CWB’s work depends on the aidof volunteers in a variety of capacities.

　　Education background for waterchemists involves studying sciences outside the chemistry field.

　　7

　　NO CHANGE

　　campaigns, others hold

　　campaigns; others hold

　　campaigns, others holding

　　8 The writer is considering deleting theunderlined sentence. Should the writer make this deletion?

　　Yes, because it blurs theparagraph’s focus on the education of water chemists.

　　Yes, because it is redundantwith information provided earlier in the passage.

　　No, because it providesinformation that supports a claim made in the introductory paragraph.

　　No, because it providesexamples that elaborate on the previous sentence.

　　9

　　NO CHANGE

　　Careers in water chemistryleading

　　A career in water chemistrythat leads

　　A career in water chemistry canlead

　　10

　　NO CHANGE

　　is

　　were

　　have been

　　11 Which choice best concludes the passage?

　　NO CHANGE

　　While this might look like aninsignificant percentage, water chemists have still made great strides.

　　Volunteers are also crucialcontributors to the advances in the water chemistry field.

　　The need for water chemistswill likely continue to grow as individuals take advantage of the travelopportunities that this field provides.

　　BCDBA CBDDB A