my name is Nam. Last weeked, I visited the countryside .............. my classmate . the place is not very far........... our town . we came there bu bus-a jorney of two hours. On arriving there, we..............straight to our friend's house. He is Trung whose parents.......... farmers living in a countryside . We drank coconut milk and..........a lot of country pancakes . After that we went flying kites in a paddy............then we went swimming in the river near Trung'house . we played games together

finally, in the afternoon we ................. the countryside for the town. and reached home at ........ beautiful and interesting places than in the town

đọc đoạn văn và điền từ thích hợp ( mỗi chỗ trống 1 từ )

1fruit juice and milk are very ................ drink for children (health)

2 she has a lot of stamps in her ........................... (collect)

3 Nam is the ................ student in his class (good)

4mai is a good dancer so she dances very....... (beauty)

5 we usually take park in many different ............ at recess ( act)

6 there are many badminton ............. nowadays (complete)

7 the nurse needs to know Hoa's.......... (high)

8 English is an ........... and important subject (interest)

9Hoa is heaving a ...................check-up (medicine)

Đốt cháy hoàn toàn 0,1 mol hidrocacbon X no mạch hở thu được 0,3 mol CO₂. Công thức của X là

A.C₃H₈

B.C₃H₆

C.C₃H₄

D.C₄H₁₀

Nhận biết các chất lỏng riêng biệt: ancol etylic, clorofom, benzen bằng 1 thuốc thử nào sau đây?

A. H₂O

B. CuO

C. Cu(OH)₂

D. Na

Tên gọi của hợp chất có công thức cấu tạo CH₂=C(CH₃)CH=CH₂ là 

A. buta-l,3-đien

B. isopren

C. đivinyl

D. isopenten.