Unit 1

Question 1

To become weaker: to decrease. The speaker waited until the applause had abated before continuing

Answer 1

Abate

Question 2

To admit the existence of. Did the teacher acknowledge that you turned in your paper?

Answer 2

Acknowledge

Question 3

To express recognition or thanks for. The new Wimbledon singles champion raised her hand to acknowledge the cheers of the crowd.

Answer 3

Acknowledge

Question 4

A person who acts or does business for another. The author’s agent found a company to publish his latest mystery story.
Something that brings about a result a new principal can be a powerful agent for change in a school.

Answer 4

Agent

Question 5

The right to give orders, make decisions, or take action. Only the congress of the United states has the authority to declare war.
An expert source of information. The researcher Jane Goodall is a world authority on chimpanzees.

Answer 5

Authority

Question 6

To ruin or destroy

Answer 6

Devastate

Question 7

The rapid spreading of a disease

Answer 7

Epidemic

Question 8

A number that is not exact

Answer 8

Estimate