18.
which word best completes the sentence?

jamaal and are exercising.

i
me

19. which sentence has the correct subject-verb agreement?

heavy rains or fast-melting snow causes floods in many parts of the world.
heavy rains or fast-melting snow cause floods in many parts of the world.

20. which sentence has the correct subject-verb agreement?

lightning bolts flash across the sky.
lightning bolts flashes across the sky.

At the edge of the lawn, behind the building, there was a line of underbrush and trees sloping down a hillside. beyond that, there was a playground next to a day-care center. they could hear shouts of children in the air, and when they looked through the underbrush, they could see bundled-up four-year-olds swinging on swings and racing around a playhouse. the operation would be carried out near children. –the hot zone, richard preston what is the author’s purpose for including this paragraph? check all that apply. to express his thoughts clearly to inform readers about the location to persuade readers to become scientists to entertain readers by showing how dramatic the situation is to encourage readers to protect children