số xi măng được lấy ra là :

50  30 (kg)

Số xi măng còn lại trong bao là:

50 - 30 = 20 (kg)

Đ/S : 20 kg

D

33.A

34.C

35.C

36.C

a,9/8

b,14

c,2/9

Tham khảo:

I have a lot of dreams for the future. For a career, I really want to become an English teacher in my country. Being a teacher is a dream for me since childhood. I'm trying to improve myself everyday. I hope the dream can come true. I want to explain why I want to become an English teacher in Vietnam. In our country, English education is only the beginning of our society. People have the passion to learn it. Then, because of globalization, our country needs a great deal of English control. All diplomatic matters require English. If I was an English teacher, I would help people learn English well. Then all the work will be very easy. This is really great,

27.D

28.A

C

A

17/10

B