Exer
13. opt (v)→ option (n) → optional (a) → optionally (adv)
a) Is English a compulsory or
subject?
b) Mr. Nguyen
for early retirement last year.
c) There are various
open to someone who is willing to work hard.
14. industry (n) → industrial (a) → industrially (adv)
→ industrialize (v) → industrialization (n)
a) Ho Chi Minh city is the biggest
city in Viet Nam.
b) It was the first country to
c) The city needs to attract more
15. tropics (n) → tropical (a)
a) Viet Nam is a
country.
b) She's a botanist, and spent several years researching in the
16. nation (n) → national (a) → nationalize (v): quốc hữu hóa→ international(a): thuộc quốc tế
→ multinational(a): đa quốc gia → nationality (n): quốc tịch
language is Bahasa Malaysia.
a) The
b) All the
of the world will be represented at the conference.
peace-keeping force.
c) The UN has sent a
d) We teach students of all
17. Malaysia (n) → Malaysian (a/n)
a) The
unit of currency is the ringgit.
is Kuala Lumpur.
b) The capital of.
18. know (v)→→ knowledge (n) →→ known (a) →→ knowledgeable (a)
→ knowing (a) → knowingly (adv)
about German Literature.
a) He's very
b) Her
of English grammar is very extensive.
at him.
c) She smiled.
d) There is no
reason for the accident.
19. enjoy (v) → enjoyable (a) → enjoyably (adv) → enjoyment (n)
a) Thank you for a most
evening.
b) Knowing the ending already didn't spoil my
of the film.
c) I want to travel because I
meeting people and seeing new places.
20. compel (v) → compulsion (n) → compulsory (a)→ compulsorily (adv)
a) English is a second
language in Malaysia.
b) As a school boy, he was
to wear short even in winter.
c) We were under no
to attend.
21. produce (v) → product (n) → production (n) → productive (a) →→ productively (adv)
a) Only farm
are sold at a floating markets.
b) France
a great deal of wine for export.
c) Wheat
has risen over the years.
d) Their working system is based on the belief that people work more
in a team.
22. humor (n) →→→ humorous (a) → humorously (adv)
a) I like working with
people.
b) He's got a great sense of