Excerpt from "Promoting Childhood Immunizations" Immunization was perhaps the single most beneficial public health measure of the 20th century. ?Vaccine manufacturers
work in tandem with government, academic, and nongovernmental agencies to develop safe and effective vaccines that
decreases health costs and improve compliance. Despite overwhelming evidence of vaccine safety, suspicion and
misconception continue in small groups of hesitant or resistant parents, often leading to outbreaks of vaccine-preventable
infections on the front lines of vaccination, nurse practitioners can improve vaccination rates by developing a trusting
relationship with parents and being armed with information based on sound clinical evidence. Sthe study that follows was
supported by the Intramural Research Program of the National Institutes of Health, Clinical Center, Department of Radiology,
and National Cancer Institute.
http://www. npjournal. org/article/
If a student is proofreading for use of straightforward subject-verb agreement, which sentence requires correction?
A)
Sentence 1
B)
Sentence 2
C)
Sentence 3
D)
Sentence 4

The “big dig” the “big dig” (the central artery/tunnel project) has been complex and challenging. located in boston, massachusetts, this tunnel is eight lanes wide and three-and-a-half miles long. what is most amazing about this tunnel is that it is constructed under a major highway and skyscrapers located in boston’s financial district. construction crews used “clamshell excavators” during this dig. these machines carved narrow trenches, and then a special substance was pumped into the trench to keep the dirt from caving in. finally, steel beams were lowered into the trench and concrete was pumped in. one problem that engineers faced while constructing the tunnel is the fact that the soil beneath boston is extremely loose and soggy. engineers solved this dilemma by freezing the soil and pumping very cold water into pipes beneath the city. to strengthen the soil even further, a special type of glue was injected into the ground to with the consolidation of the soil. 23 which phrase best defines the word excavator as used in the passage? a. a device used to measure underground temperatures b. a device used to level uneven surfaces c. a device used to move heavy objects d. a device used to dig holes