II. Complete the sentences with the words in part I.

chemist/ archaeologist/ software developer/ physicist/ explorer/ biologist/ inventor/ conservationist
1. Christopher Columbus was an Italian__________ who discovered the Americas.
2. Marie Curie was a Polish__________ who discovered the elements polonium
and radium.
3. The__________ reconstructed the broken ancient vase from its fragments.
4. As a__________, you’ll work to protect and enhance the local environment.
5. Mr. Kaku is a quantum__________ , a founder of string field theory.
6. Matt works as a__________ for a Computer manufacturer.
7. Eugenie Clark was an American marine__________ who worked with sharks.
8. Tim Berners-Lee is best known as the__________ of the World Wide Web.

I. Match the names of occupations with their definitions.
1. chemist
2. archaeologist
3. software developer
4. physicist
5. explorer
6. biologist
7. inventor
8. conservationist

a. a person who has invented something
b. a person who travels to unknown places in order to find out
what is there
c. a person who works to protect the environment, plants, animals
and natural resources
d. a person who studies the buildings, graves, tools, and other
objects of people who lived in the past
e. a person who builds and creates Computer programs
f. a scientist who works with Chemicals or studies their reactions
g. a scientist who studies physics
h. a scientist who studies living things

III. Fill in the gaps with the words in the box. Then read the sentences aloud.

impossible/ uninformed/ unavailable/ unable/ unavoidable
unforeseen/ impatient/ impolite/ untidy/ immature

1. I tried to speak to the professor, but he was__________.
2. There are now fears that war is__________.
3. Kevin is so__________. His room is always a mess.
4. He was angry to find that he had been__________.
5. The boys in my class are so__________- they’re always doing silly things.
6. It’s__________ to predict the weather around here.
7. I thought she was very__________. She kept interrupting me.
8. I’m sorry I was__________ to attend the meeting.
9. Don’t be so__________! The bus will be here soon.
10. Due to__________ circumstances, the play has been cancelled.

II. Write the words from the box in the correct part of the table, according to the stress
pattern.

unfriendly/ unreasonable/ uncomfortable/ immobile/ unhurt/
impure/ impolite/ immaterial/ imperfect/ unpaid/ uncertain/
improbable/ unafraid/ impersonal/ unnecessary/ unacceptable/
impractical/ unavoidable/ untidy/ uninformed

oO
oOo
ooO
oOoo
oOooo
ooOoo

I. Write the prefix im- or un-, then put the stress on each word.
______do ______employed ______possible ______practical
easy______ ______polite patient______ ______acceptable
______limited ______movable ______mature ______decided
______expected ______proper ______moral ______natural
______balance ______important ______polluted ______healthy