\(\left|\dfrac{-1}{2}-\dfrac{1}{-5}\right|-\dfrac{-1}{4}\)

\(=\left|\dfrac{-1}{2}+\dfrac{1}{5}\right|+\dfrac{1}{4}\)

\(=\left|\dfrac{-5}{10}+\dfrac{2}{10}\right|+\dfrac{1}{4}\)

\(=\left|\dfrac{-3}{10}\right|+\dfrac{1}{4}\)

\(=\dfrac{12}{40}+\dfrac{10}{40}\)

\(=\dfrac{11}{40}\)

- Name of festival: Mid Autumn Festival.

- What was the festival: it's an occasion for children to play and have a parade.

- Where was it held: anywhere.

- When was it held: August 15th Lunar.

- Who celebrated it: everyone can celebrated it.

- Why was it held: Because it is an occasion for children to see the circle moon, and many different reason,...

- How was it held: We decorate a stage and eat sweets and play and watch some performance,......

They and us can play volleyball.

\(\Rightarrow x+\frac{3}{4}=0\Rightarrow x=-\frac{3}{4}\)

\(y-\frac{1}{5}=0\Rightarrow y=\frac{1}{5}\)

\(x+y+z=0\Leftrightarrow-\frac{3}{4}+\frac{1}{5}+z=0\Rightarrow-\frac{11}{20}+z=0\Rightarrow z=\frac{11}{20}\)

Vậy x = \(-\frac{3}{4}\) ; y  = \(\frac{1}{5}\) ; z = \(\frac{11}{20}\)

My father prefer black coffee to white coffee.

1. A lot of cultural and artistic activities are held as part of the flower festival in Da Lat.

2. I saw a parade of flower floats when I attended the festival last year.

3. We had a celebration meal on my grandfather's birthday.

4. The Christmas season is also called the festive season.

5. I loved the performence of folk songs.

6. There is a special celebration for Japanese girls on March 3rd every year.

1. My brother is not very sporty. He usually stays at home and reads books in the afternoon.

2. What is your favourite subject at school?

3. I am not interested in this talk.

4. How many times a day you brush your teeth?

5. Don't buy plenty of fat foods because they're not good for you.