1. A: When is your birthday? Is it in April?
B: No, it is in July, on the fifth.

2. I don't want to go out in winter because it's very cold outside.

3. A: When does your flight arrive?
B: At 8 o'clock in the morning.

4. She works on Saturday morning, but she's free in the evening.

5. The library open at 8:30 a.m. and 4:30 p.m.

6. There was a loud noise that woke me up at midnight

7. They were very popular in the nineteenth century.

8. Jim's younger brother was born on September 2^nd, 2013 at 9pm.

9. My parents give me lucky money on New Year's Eve.

10. On my graduation day, I received lots of compliments.

At this time last night, I was watching television

1. Disc-shaped

2. Diagram

3. Currency

4. Emblem

5. Excursion

6. Guarantee

7. Locate

8. Security 

9. With

10. Apartheid 

1. B
2. C
3. D
4. A
5. C
6. D

1. Students can join one of our cleanup to clean the beaches all around Vietnam. 
2. We are taking these old newspaper to the recycle bins in town. 
3. You can help by donating money or books to the charity. 
4. We can use empty glass jars to store food. 
5. Forests are very useful. They give living places for animals.
6. WildAct is an environmental charity in Vietnam.
7. It is a very funny movie with lots of laughter and the ending is hilarious. 
8. My little sister loves watching animated movies. Her favorite ones are Toy Story series. 
9. I like the film at all. It was so interesting.
10. The movie was so sad that I cried a lot. 

Diện tích xung quanh thùng:
 (5 + 2,5) x 2 x 3 = 45 (m2)
Diện tích đáy thùng:
 5 x 2,5 = 12,5 (m2)
Diện tích cần quét sơn:
 45 + 12,5 = 57,5 (m2)
               Đáp số : 57,5 m2

a) Chiều rộng bể là:
 3,6 : 2 = 1,8 (m)
Thể tích hồ nước là:
 3,6 x 1,8 x 1,5 = 9,72 m3 
b) Đổi : 9,72 = 9720 dm3 = 9720 lít
Lượng nước có trong bể là:
 9720 : 4 x 3 = 7290 (lít)
Lượng nước cần bơm thêm vào bể để đầy hồ là:
 9720 - 7290 = 2430 (lít)
                 Đáp số : a) 9,72 dm3
                               b) 2430 lít

\(\dfrac{2x}{18}\) \(=\) \(\dfrac{5}{9}\) \(+\) \(\dfrac{2}{3}\)
\(\dfrac{2x}{18}\) \(=\) \(\dfrac{11}{9}\)
\(2x . 9\) \(=\) \(18 . 11\)
\(2x . 9\) \(=\) \(198\)
\(2x \)    \(=\) \(198 : 9\)
\(2x\)    \(=\) \(22\)
\(x\)      \(=\) \(22 : 2 = 11\)

\(x\) \((\)\(\dfrac{3}{2.5}\) \(+ \) \(\dfrac{3}{5.8}\) \(+\) \(\dfrac{3}{8.11}\) \(+\) \(\dfrac{3}{11.14}\)\()\) \(=\) \(\dfrac{1}{21}\)
\(x\) \((\)\(\dfrac{1}{2}\) \(-\) \(\dfrac{1}{5}\) \(+\) \(\dfrac{1}{5}\) \(-\) \(\dfrac{1}{8}\) \(+\) \(\dfrac{1}{8}\) \(-\) \(\dfrac{1}{11}\) \(+\) \(\dfrac{1}{11}\) \(-\) \(\dfrac{1}{14}\)\()\) \(=\) \(\dfrac{1}{21}\)
\(x\) \((\)\(\dfrac{1}{2}\) \(-\) \(\dfrac{1}{14}\)\()\) \(=\) \(\dfrac{1}{21}\)
\(x\) x \(\dfrac{3}{7}\) \(=\) \(\dfrac{1}{21}\)
\(x\)        \(=\) \(\dfrac{1}{21}\) \(:\) \(\dfrac{3}{7}\) 
\(x\)        \(=\) \(\dfrac{1}{9}\)