7C₆H₅CH₂CH₃ + 18KMnO₄ → 8C₆H₅COOK + 18MNO₂ + 10KOH + 10H₂O

1. All the workers of the plant were instructed by the chief engineer.

2. Some of my books has been taken away.

3. The meeting will be hold before May Day.

4. The engine of the car have to be repaired.

5. The window was broken  and some pictures were taken away by the boys.

Mark the letter A , B , C , or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions :

A. confident B. negative C.embarrassed D. worried

1.she had someone repair her car .

2.you’ve got to see the manager tomorrow morning.

7³  = 343

Cửa hàng đã bán số tấm vải là:
   5 x \(\dfrac{1}{5}\) = 1 (tấm vải)
Cửa hàng đã bán số vải là:
   1 x 30 = 30 ( m )
             Đ/s: 30m

2. has already been paid

3. is spoken

7. haven't done

8. used to be drunk

are being freezed

1.has been collected

Mưa axít là mưa chứa 1 lượng axít tạo nên chủ yếu là từ:

A.Phản ứng hóa học xẫy ra trong không gian;

B.Chất ô dôn trong bầu khí quyển ;

C.Khói xe và khói các nhà máy thải ra trong không khí;

D.Khí CO2 do sinh vật trên Trái Đất thải ra;

Hoa’s grandma likes watching the weather (31) ………forecast……………on TV. The weather in Ha Noi is often mild. The (32) ………temperatures……………in Ha Noi are often between 26­­­­­­­­­­°C and 30°C. However, they are much lower between December and February. Ho Chi Minh City often experiences (33) ………… higher………… temperatures than those of Ha Noi and Hue. Thunderstorms, with lightings and heavy rains, often take (34) ………place……………along the south-central coast. The Cuu Long Delta experiences sunny weather almost all the year around. However, in this (35) ………area……………, there are sometimes heavy rains and floods (36) ………that……………cause a lot of damage to the crops.