The "big dig" (the central artery/tunnel project) has been complex and challenging. located in massachusetts, this tunnel is eight lanes wide and more than three 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 and then a special substance was pumped into the trench to keep the dirt from caving in. beams were lowered into the trench and concrete was pumped in.
complete the sentences with words that are punctuated and spelled correctly.

Read the sentence below about the chicago fire of 1871. schaffer told someone else to strike the wrong alarm box and that caused a miscommunication during the chicago fire of 1871. which revision is the best example of adding concrete details? schaffer told another person in his office to sound the wrong alarm and that caused a big miscommunication during the chicago fire. schaffer told his assistant to strike the wrong alarm box and that caused a miscommunication during the massive chicago fire of 1871. schaffer mistakenly told his assistant to strike alarm box 342 instead of the correct box and that caused a miscommunication during a fire in chicago. schaffer mistakenly told his assistant to strike alarm box 342, and as a result, firefighters were directed to an incorrect location during the chicago fire of 1871.