This machine is very easy ______. Anyone can learn touse it in a few minutes.

. It is not I but you who ___ the first to run to the goal in the competition.

It was about 600 years ago _______the first clock with a face and an hour hand was made.

Could you please lead your car to me this Sunday? —_________you have it cleaned after using it

Tony wanted to take some good photos,______ he lost his camera.