1.He can answer all my questions.

→ All my ..questions can be answered (by him)..........

2. Because of the bad weather, we cancelled our trip to Tam Dao.

→ Because the…weather was bad, we cancelled our trip to Tam Dao……………………

3.It is a month since she last wrote to me.

→ She has ..not written to me for a month...................

4. Is it necessary to bring warm clothes with me?

→ Should...I bring warm clothes with me...........?

5. “Why don’t you ask her yourself?”

→ He suggested.....asking her himself/herself.............

Tìm x:

\(x\left(5-2x\right)-2x\left(1-x\right)=15\)

\(\Leftrightarrow5x-2x^2-2x+2x^2=15\)

\(\Leftrightarrow3x=15\\ \Leftrightarrow x=5\)

\(\left(3x+2\right)^2+\left(1+3x\right)\left(1-3x\right)=2\)

\(\Leftrightarrow9x^2+12x+4+1-9x^2=2\)

\(\Leftrightarrow12x=-3\\ \Leftrightarrow x=\dfrac{-1}{4}\)

\(\dfrac{2^{11}.9^2}{3^5.16^2}=\dfrac{2^{11}.\left(3^2\right)^2}{3^5.\left(2^4\right)^2}=\dfrac{8}{3}\)

\(\dfrac{9^3.27^2}{6^2.3^{10}}=\dfrac{\left(3^2\right)^3.\left(3^3\right)^2}{\left(2.3\right)^2.3^{10}}=\dfrac{1}{2}\)

\(\dfrac{27^{15}.5^3.8^4}{25^2.81^{11}.2^{11}}=\dfrac{\left(3^3\right)^{15}.5^3.\left(2^3\right)^4}{\left(5^2\right)^2.\left(3^4\right)^{11}.2^{11}}=\dfrac{3.2}{5}=\dfrac{6}{5}\)

This is the first time I (read) have read a novel (write) written by an American novelist.

She wore a wig (avoid) to avoid (recognize)being recognized.

Bill (have) was having breakfast when I (stop) stopped by his house this morning.

She (learn)learns English at school, but she (forget)forgets most of it now.

By the time he (return) returns next week, I’m sure we (finish) will have finished decorating our house.

10.cultured hay cultural gi do a

Complete the sentence with the correct form of the words in brackets.

1.   Many ethnic groups managed to live together _________peacefully___________. (peace)

2.   How often is the Gong Festival _____celebrated_______________? (celebrate)

3.   The _________majority__________ of people in Vietnam belong to the Kinh people. (major)

4.   The ____communal___________ house is the place where village ceremonies and festivals take place. (commune)

5.   _______embroidery__________ is a traditional folk art of the Miao people. (embroider)

6    Five-coloured sticky rice is a traditional   _________speciality________ of Tay people. (special)

7.   H’mong people live in the northern _________mountainous__________ region of Vietnam. (mountain)

8.   The Tai are known for their _________weaving_________ garments and their houses on stilts. (weave)

9.   The ____________ethnicity________ you can find in Sapa include the Hmong, Dao, and Tay. (ethnic)

10. Muong people are __________________ more closely related to the Tai people. (culture)