Garbage trucks pick up rubbish and take it to dumps. Over time, the piles of rubbish at the dumps get bigger. The dumps are getting full. Now, we know that some things people throw away can be________Recycling trucks come to many homes to________these recyclables.

Some people sort their________into two separate boxes. This is called two-stream recycling. One box________paper products, and one box holds plastic, glass, and metal materials. Other people use single-stream recycling. They do not sort their recyclables into________boxes.

The recycling trucks collect the recyclables that people throw away and________the materials to recycling centers. In some places, workers sort the materials by hand,________many places use workers as well as machines to sort the recyclables.

New technology has made recycling centers more________. Large machines with magnets（磁铁）sort metal materials. The magnets separate steel cans from aluminum cans. The cans are crushed and________to companies that reuse the metal, Other________crush paper and tie it together. Paper companies buy these things to make fresh paper.

Recycling is________for many reasons. If we recycle everything we can, garbage dumps will not fill up so________. Also, by recycling old materials, we will use________new materials. Recycling uses less energy than making________ products. Recycling saves fossil fuels and________pollution. This is good for our planet's health.

Martin Strel knows a thing or two about rivers. He has been swimming in them _________ he was a young boy. Although he holds five world records in marathon swimming, he is best known for using his sport to raise _________ of water pollution. After years of swimming in dirty water, he decided he had to do _________. He began to swim _________ “peace, friendship and clean water”. He hopes to see _________ laws strengthened.

So far, he has swum in many of the world’s most famous rivers. In 2000, he _________ to swim in Europe’s second longest river, the Danube. He swam 1,866 miles in 58 days and _________ a world record for long-distance swimming. In 2002, Strel swam in the Mississippi River and _________ a distance of 2,360 miles in 68 days. In 2007, he swam 3,274 miles of the Amazon River in 66 days. Most of the _________ in the Amazon comes from harmful chemicals used in gold mining and oil leaks (泄漏) from __________ maintained boats. He became very weak and __________ 42 pounds. In order to continue swimming, he had to be carried in and out of the __________.

Still, Strel plans to __________ swimming for peace, friendship and clean water, but he would prefer to do it in the ocean. __________, the world’s rivers are too dirty. He __________ a day when everyone can go swimming in clean water.

With about 100,000 marine animals being choked or injured by plastic every year, the danger posed by the pieces of plastic floating in our oceans is well- known. However, given that most of the small plastics measure less than 0.5 mm, collecting them is a _______task. Now, some Dutch environmentalists have found a way to catch plastic waste _______ it reaches the open seas and falls to pieces.

The 1,500-square-foot Recycled Floating Park is now floating in the Rotterdam Harbor in the Netherlands. Scientists _______by developing a "plastic fisher”, a floating garbage _______ device. Fitted with two folding arms that enlarge several feet into the water, it uses a net to _______wrappers, bottles, any other garbage that floats past.

The movable device, which took a year and a half to be perfected, was then placed at the edge of the harbor to collect the city that trash _______ in the New Meuse river, which rose in France and passed through Belgium, and the Netherlands, before _______ into the North Sea. Since Rotterdam's New Waterway Canal links the river to the North Sea, it was the_______ place to catch the “fresh" plastic waste before it disappeared into the open waters and broke into _______.

The waste collected by the "plastic fisher" and hundreds of volunteers, who ________the river banks, was then made into 28 hexagonal(六边形的）floats which were________ to create the park. Some of the blocks are ________to visitors, while others house various types of plants and even trees for nesting birds. The bottom of the floats provides a suitable ________for algae, mussels, and fish. The recycled ________can also be used to build sports stadiums, public walkways, and cultural centers.________, Recycled Floating Park's success will encourage countries worldwide to take on similar plans.