Read the sentence. open his chemistry book, trevor knew he had a long night of studying ahead of him. which is the best replacement for the underlined word? a. to open b. opening c. opened d. opens

What task did the surveyors do? a. they studied the landscape to determine the most direct route for building a road. b. they designed treadmills that lifted blocks of stone to where they were needed. c. they dug trenches and filled them with sand, concrete, and large blocks to form a road.