Ineed a correct answer of edith each sentence for pronoun usage. 1. the instructor made clear to everyone what they had to do to pass the class. 2. marcie signed up for advanced classes without consulting her advisor, which was a big mistake. 3. the computer did not allow access to students which tried to register before registration opened. 4. many people shy away from the old because they think of it as being senile and withered. 5. it did not get above freezing today, so it is still too dangerous to drive on the back roads. 6. we always wait until the day before christmas to buy a tree because they are discounted by then. 7. to end the strike, the union approved the agreement and told their members to go back to work. 8. everybody agreed to do the maintenance ourselves rather than pay someone to do it. 9. physical activity is good for you, but people lack the discipline to exercise as much as they should. 10. mr. roberts told his son that he didn't know to dance.

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