AT THE PUBLIC WE CAN SEE THIS SIGN(B),IT MEANS _____. (B)A.YOU SHOU...

16.

At the public we can see this sign

(B),

it means _____.

(B)

A.You should not make this place tidy.

B.Putting unused things into the garbage dump is necessary.

C.Recycling is very important to protect the environment.

D.You shouldn’t throw your garbage here.

V. Choose the word (A, B, C or D) that best fits the blank space in the following

passage.

In recent years, the problem of environmental pollution has (17) _____ a serious

situation in big cities of our country. Why? - Nowadays, we are living in a city with an

increase in population, so domestic waste is the first reason. Then many people’s social

(18 ) _____ is not high. In several areas, they throw trash on the street or onto the rivers.

It is easy for us to see rubbish of all kinds (19) ______ on the water. Moreover, many

uncultured people even “make water” in the public place. Secondly, our city is

overloaded with

vehicles that expel all (20) _______ and dust from them. This

contributes to the heat of the air, and causes pollution. Thirdly, in several places, trees

(21) ______ cut down to have room for buildings, hotels, or supermarkets. This makes

the atmosphere in our city muggy and stuffy as well. Also, many factories send out waste

into the rivers or poisonous gas into the air. Finally, the drainage system in our city is

very old and downgrade, so it’s always flooded whenever it rains. In conclusion, air (22)

______ in the cities are really alarming problem now! What do you think about this?