1032; 1230; 1302; 1320; 2130; 2310; 3102; 3120; 3210

\(\dfrac{1}{2}.\dfrac{1}{3}=\dfrac{1}{2 . 3}=\dfrac{1}{6}\)

phải là a chứ?

What book are you going to ____________ ?

a, read

b, reads

c, reading

31. In front of the my house => In front of my house
32. Forty students does your class => Forty students in your class?
 

nhìn như chỉ có mình e vote a Hải thế chị? Karik-Linh

1.The most popular after school _activities_ in Viet Nam are football and badminton. 

2.The city library has over 60 _employees_. 

3.English is an _interesting_ and important subject. 

4.Science books are very _useful_ for our study of the world. 

5.Ba is famous stamp _collector_. 

6.They learn to play a _musical_ instrument. 

7.The team has many talented _players_. 

8.We sat on the beach _watching_ a spectacular sunset. 

\(5+\dfrac{4}{7}=\dfrac{35}{7}+\dfrac{4}{7}=\dfrac{39}{7}\)

\(\dfrac{2}{3}-\left(\dfrac{1}{6}+\dfrac{1}{8}\right)=\dfrac{2}{3}-\dfrac{7}{24}=\dfrac{16}{24}-\dfrac{7}{24}=\dfrac{9}{24}=\dfrac{3}{8}\)

mệnh đề đúng
 Hình vuông cũng là hình bình hànhvì thỏa mãn 3 điều kiện: