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a student must write a three-page essay for a science class. which of the following topics is narrow enough?

a. the life cycle of a butterfly

b. the geology of north america

c. african mammals

d. chemical reactions

Which statement is the best summary of the theme in this passage? people almost always disappoint their family members. working hard and being honest leads to long-lasting rewards. showing strength in a crisis makes problems easier to overcome. unintentional betrayal can lead to severe consequences

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

Samuel johnson and oliver goldsmith had which of these in common? select all that apply. sensibility difficult poetic diction life of poverty distrust of parliament whig party leanings admiration of swift and pope