unit 25

Question 1

aircraft

Answer 1

n. An aircraft is a vehicle that flies in the sky’ such as an airplane or helicopter. At the museum in the airport’ you can see a lot of old aircraft.

Question 2

celebrity

Answer 2

n. A celebrity is someone who is famous. It was the highlight of the evening when the celebrities arrived.

Question 3

concrete

Answer 3

n. Concrete is a substance made from stones. The man covered the ground with concrete.

Question 4

decisive

Answer 4

adj. If someone is decisive’ they make decisions quickly. Our boss is very decisive’ so it did not take long to organize the project.

Question 5

esteemed

Answer 5

adj. If someone is esteemed’ many people like or respect them. An esteemed scientist is coming to the university to talk about his discoveries.

Question 6

ethical

Answer 6

adj. If something is ethical’ it is the right thing to do. Many people believe that it is ethical to help others in need.

Question 7

extinct

Answer 7

adj. If plants or animals are extinct’ there are none left. There used to be dinosaurs all over the world’ but now they are extinct.

Question 8

hardy

Answer 8

adj. If a person or plant is hardy’ it is strong and can live through difficult conditions. The farmer is a hardy man and doesn’t mind working outside.

Question 9

institute

Answer 9

n. An institute is an organization that is interested in research or teaching. I am going to a lecture about Ancient Rome at the Historical Institute.

Question 10

jealousy

Answer 10

n. Jealousy is a feeling of wanting something that somebody else has. She felt a lot of jealousy when she saw her friend with a new car.

Question 11

migrate

Answer 11

v. To migrate means to move from one place to another. Many birds migrate to warmer countries in the winter.

Question 12

nurture

Answer 12

v. To nurture something means to care for it as it grows or develops. Robert nurtured his plants’ and that is why they grow so well.

Question 13

overhead

Answer 13

adv. If something is overhead’ it is located above you. As we sat on the top of the hill’ a plane flew overhead.

Question 14

principle

Answer 14

n. A principle is a belief about the correct way to behave. To maintain principles’ it’s vital to watch’ listen’ and speak carefully.

Question 15

rural

Answer 15

adj. If a place is rural’ it is in the countryside instead of the city. I want to live in a small house in a rural area.

Question 16

secluded

Answer 16

adj. If a place is secluded’ it is far away from any other place. There was a secluded bench in the park.

Question 17

species

Answer 17

n. A species is a type of plant or animal. There are 21 different species of butterfly in this forest.

Question 18

swamp

Answer 18

n. A swamp is a very wet area of land. There are lots of wild animals living in the swamp.

Question 19

traverse

Answer 19

v. To traverse means to move or travel through an area. The explorer traversed the desert alone on a camel.

Question 20

zoology

Answer 20

n. Zoology is a subject in which people study animals. Helen wants to study zoology because she has always liked animals.