Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word for each of the blanks from 51 to 60. Public awareness of the value of recycling materials such (51) _______ plastic, paper, and glass is increasing daily in all corners of the globe. In some countries these efforts are being (52) _______ by the local governments and in others, by individuals. Participation in these programs is at an all-time high. In the small town of Truro in eastern Massachusetts, for example, space in the local landfill has run out; therefore, residents have had to think of new ways to (53) _______  of their trash. With no room for items such as newspaper, bottles, and old lumber at the landfill, local residents have come up with many (54) _______  programs to recycle and / or reuse what was once (55) _______  of as only trash. For instance, yard waste such as leaves and grass which used to be thrown in the landfill is now broken down and made (56) _______  compost used by local people as fertilizer in their gardens. In addition, (57) _______  plastics, newspapers, bottles and cans are sold to a recycling company, thereby bringing in revenue for the town. The most popular local innovation, though has been the founding of a “swap shop.” This is a building to which people bring their unwanted clothing, books, and toys so that others who need them can (58) _______   them. Since there is so much (59)  _______  in all the recycling programs, the dump is seen as a place to meet with friends and neighbours and catch up on local news. There is even an annual September evening “dump dance,” where locals dance to live music and have picnics by candlelight at the dump. This has become a high light of the summer vacation season. As humankind continues to (60) _______ and the population grows, recycling efforts become even more important. These efforts must continue so that we will soon see new innovations and ideas concerning the use of recycled materials.   Trả lời câu hỏi dưới đây: