a) (x^3 - 2y)^3
b) (x-3y) (x^2 + 3xy +9y^2)

Ex 1. Make a question for the underlined part.
1. The communal house is usually the largest building in my village.
.........................................................................................................
2. The peoples of Viet Nam are very open and friendly.
.........................................................................................................
3. The musical instrument made from bamboo is called the chapi.
.........................................................................................................
4. Hung Kings are the founders of our nation and they became the first kings of our country.
..............................................................................................
5. We had a good time in our countryside last summer.
..............................................................................................

Ex 5. Choose the correct word A, B, C or D for each gap to complete the following
passage.
My parents are farmers. They work very ... (1) ... on the paddy fields. They usually get...
(2) ...very early in the morning. After ... (3) ... breakfast, they feed the buffaloes, pigs,
chickens, ducks and they... (4) ... the eggs. From about eight, they work on the field. They...
(5) ... rice but their... (6) ... is vegetables. From eleven thirty to one thirty, they rest and have
lunch. They continue to work until five in the afternoon then they come back home. My
mother ... (7) ...the animals again while my father ... (8)... the buffalo shed and the chicken
coop. They usually finish their work at about six thirty. Twice a week, my mother... (9) ... the
vegetables and eggs to the town market to sell them then she often buys the things we need for
our daily life. She also... (10) ... me a small present each time.
1. A. hard                   B. hardly                C. harder              D. hardest
2. A. on                      B. off                      C. up                     D. in
3. A. to have              B. having                C. have                 D. had
4. A. take                   B. see                    C. have                  D. collect
5. A. plant                  B. water                 C. grow                  D. cut
6. A. period                B. crop                  C. time                   D. harvest
7. A. leads                 B. feeds                 C. gives                 D. calls
8. A. cleans               B. washes              C. polishes            D. clears
9. A. makes               B. takes                  C. carries              D. brings
10.A. buying             B. buys                   C. to buy                D. bought

Choose the best answer A, B, C or D.
1. My dad doesn't mind............... my mom from work every day.
a. pick up b. picked up c. picking up d. picks up
2. Using computers too much may have harmful effects ....... . your mind and body.
a. on b. to c. with d. onto
3. I love the people in my village. They are so..................... and hospitable.
A. friendly b. vast c. slow d. inconvenient
4. Among the .................., the Tay people have the largest population.
A. groups b. majorities c. ethnic minorities d. ethnic cultures.
5. People in the countryside live .................. than those in the city.
a. happy b. more happily c. happily d. less happy

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