Ex 4 Look at the photo again and correct the sentences

the bird has just strethed its wings. (present perfect)

a bicycle, also known as a bike, pushbike or cycle, is a human-powered,pedal-driven,    single-track vehicles, having two wheels  attached to a frame, one behind the other. a person who rides a bicycle is called a  cyclist, or bicyclist.

bicycles were introduced in the 19th century and now number about one billion worldwide, twice as many as  automobiles. they are the principal means of transportation  in many regions. they also provide a popular form of recreation, and have been adapted for such uses as children's toys, adult fitness, military and police applications, courier services and  bicycle racing.

в конце концов я увидел утес дьявола - он был велик, нет, он был огромен. внезапно мне стало нехорошо, я почувствовал нервную дрожь в животе и захотел пить. возможно это было из-за солнца, его было много, даже слишком много. я надел солнечные очки, но лучше не стало. я страдал от жажды так сильно, что не мог ни разговаривать, и был так болен, что не мог взбираться на гору.

1.  the article having been read we knew the subject much better. b)  так как статья была прочитана; 2.  having stopped the computer he left the shop. d)  остановив компьютер.

3. the operating machine was installed in the shop. a)  работающая машина; 4.  having installed the new computer we obtained the results of the calculations quicker.

a)  установив новый компьютер;