Số gà mái có trên sân là:
 42 x 5/7 = 30 (con)
          Đáp số : 30 con

9,6

D

This type of transport is powered by electric motors.
You should ask an experienced driver for help. 

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Do you like travel by plane or by coach? 
The teachers are explaining to the difficult question.
​Cycling today has become a hot trend in this city nowadays.

We participate in a lot of activities to help the elderly people in the countryside.

He is a regular student because he goes to class every day.

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