Which sentence contains an unnecessary shift in verb tense?

every day we eat lunch at noon and sit at the same table.
carol read the book and summarized its major points.
when you leave the house, grab a sweater.
lee noticed a problem and alerts a teacher.

The greatest gift the sumerians gave the world was the invention of writing. the sumerians were wealthy people. they needed some way to keep track of what they owned. they began drawing pictures. they used a reed as a pen. they drew on soft pieces of clay. the soft clay was then dried in the sun. the tablet became a permanent record. later, the sumerian drawings changed into wedge-shaped symbols. this kind of writing is called cuneiform. by putting symbols together, the sumerians could write entire sentences.

1. during the last thirty years of his life,tolstoy had a new , or purpose, forwriting

What do these words tell us about macbeth's state of mind on the eve of battle? a. he is confident he will win the battle because of the witches' prophecies. b. he is angry that lady macbeth has killed herself and left him alone. c. he is prepared to die and regrets that he will not grow old gracefully. d. he feels ill and is worried that he will not win the upcoming battle.