What is walt witman‘s poem about when i heard the learned astronomer

Which sentence uses the past tense of to study correctly? a. mark is studying for his math test with margie. b. mark will study for his math test with margie. c. mark studied for his math test with margie.

Whom does macbeth have murdered to keep one if the witches prophecies from coming true a. malcolm and donalbain b. king duncan c. the thane of cawdor d. banque and his son

According to the study what did john steinbeck do to prepare for his book the grapes of wrath