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CROWS CAN CLEAN UP OUR STREETS

About 4.5 trillion cigarette filters are dropped on the world’s streets each year. But one
start-up company, called Crowded Cities, is working on training crows to 7.1. _____ and pick
up cigarette butts. Crows are among the most intelligent members of the animal kingdom and
7.2. _____ the idea of training them to pick up litter is not as crazy as it may sound.
According to studies, they already use certain tools in their own habitats. What’s more, they
respond well to reward systems and are 7.3. _____ of learning from one another.
The founders of Crowded Cities got the idea to use crows for their project when they
7.4. _____ some information about a man named Joshua Klein, who teaches crows to collect
coins.

An important step in the crows’ training is to teach them to drop the cigarette filters into
special machines, called CrowBars. If an item dropped into a CrowBar is identified by
the machine as a cigarette butt, it releases a piece of food for the crow as a reward. This
7.5. _____ in order to encourage the crow to return with more cigarette butts. If this scheme
proves to be successful, cigarette butts will be easily removed from streets. It must be
pointed out that cigarette butts pose a threat to the environment as they are non-degradable.
They find their way from streets to drains, to rivers, and 7.6. _____ to seas, oceans and
beaches. Not only are they unsightly, but they’re also toxic to certain marine animals.

Na podstawie: recycle.ab.ca

 

Arkusz egzaminacyjny: wersja A

7.1. A. remain B. recognize C. realize D. relieve	7.2. A. despite B. though C. therefore D. because	7.3. A. likely B. skilful C. gifted D. capable
7.4. A. came up B. came about C. came across D. came round	7.5. A. is done B. is doing C. used to do D. has been doing	7.6. A. eventually B. initially C. hardly D. extremely

 

Arkusz egzaminacyjny: wersja B

7.1. A. remain B. relieve C. realize D. recognize	7.2. A. despite B. therefore C. though D. because	7.3. A. capable B. skilful C. gifted D. likely
7.4. A. came across B. came about C. came up D. came round	7.5. A. is doing B. used to do C. is done D. has been doing	7.6. A. initially B. eventually C. hardly D. extremely