Choose the letter A, B, C or D to complete the passage below
There are two main benefits of recycling. Firstly, it reduces the size _________ (6) landfills. One of the biggest reasons_________ (7) recycling has been promoted is that it does reduce the strain on our environment. By utilizing waste products in a constructive way, we can slowly decrease the size of our landfills. _________ (8) the population grows, it will become difficult for the landfills _________ (9) so much trash. When this _________ (10), our cities and beautiful landscapes will face pollution, poisoning and many health problems. The benefits of recycling are that it helps to keep the pollution in check and decrease it little by little. Secondly, it conserves natural resources. Scrap cars, old bottles, junk mail and used rubber tyres _________ (11) becoming common features of our landfills. All of these may _________ (12) endless, but the resources required to make them are finishing off quickly. Recycling allows all of these junk items _________ (13) over and over again so that new resources do not have to be exploited. It conserves natural resources such _________ (14) water, minerals, coal, oil, gas and timber. Another one of the benefits of recycling is that it allows more emphasis to be put on creating technology to utilize what already exists. This is why a number of industries support _________ (15) where they can receive large quantities of recyclable material to convert into new items.
Question 13:
A. to use
B. be used
C. use
D. to be used
Đáp án: D
Giải thích: cấu trúc bị động allow st to be P2: cho phép cái gì được làm
Dịch: Tái chế cho phép tất cả những đồ bỏ đi này được dùng nhiều lần để cho nguồn tài nguyên mới không phải bị khai thác.