Đề kiểm tra học kì 2

His new hobby is collecting coins and detective stories. (TAKEN)

           →He____________________________

V. Finish each of the following sentences in such a way that it means the same as the sentence printed before it.

1. He will certainly succeed

=> He is

2. It is probably that he will never come back

=>In...........

3. The teacher made her students work hard for the exam

=>The students.....................

4. He is likely to arrive late again

=> He will................

5. We'll have to leave immediately at the end of the film

=> The moment................

6. It is said that the robber was caught while climbing up a fence

=>The moment.......................

7. They say that the computer is playing an important part in modern life

=> The computer.......................

8. Tim plans on seeing the doctor later about his bad back

=> Tim is.......................

9. I might call Sarah to see if she wants to go out

=>I think I...................

10. I'm not very confident of passing my driving test

=>I don't............................

11. Maria eats very little so as not to put on weight

=> Maria eats very little because...........................

12. The waitress brought him a big steak

=>A..............................................

    River pollution occurs when pollutants are not removed from sewage and are discharged into the river. River water is a very important source of freshwater required to sustain life. We need a constant supply of fresh water for drinking, cooking and washing. Animals living near the river, as well as fishes and aquatic plants, also depend on clean river water.

       When heavy rainfall occurs, pollutants accumulated within the boundaries of the catchment area may be washed into river channels. These pollutants include a variety of agrochemicals like fertilizers and insecticides.

       Waste water containing cleaning detergents, oil and other pollutants like industrial waste may be discharged into the river channel through our drainage systems. Industrial waste may contain sulfur, resulting in increasing the acidity of the river water. Sometimes, rubbish such as plastic bags and bottles, are also washed into the river channel.

Answer the questions below:

1. When does river pollution occur?

       __________________________________________________________________________

2.    What is the important role of fresh water to humans and animals?

       __________________________________________________________________________

3.    What happens when heavy rainfall occurs in a polluted area?

       __________________________________________________________________________

4.    How may waste water be discharged into the river?

       __________________________________________________________________________

5.    What is the effect of industrial waste on the environment?

       __________________________________________________________________________