Write the next sentence in this paragraph:

A man speaks to camera in front of bicycles. The man places a part on a bicycle being worked on. the man

pick from the following.
--tightens the part on the bicycle..
--uses tools involved to unscrew and remove the parts of the bike..
--demonstrates how to work every part..
--continues speaking in front of a treadmill..
tightens the part on the bicycle.