Recently people have made great progress in using ____power of nature to produce____ electricity.

John had to have his car repaired in agarage because itseriously.

You always________a mess．I can’t stand you any longer．

It is strange that Dave didn’t respond________any of my emails.—Something must have happened to him.[ ]

_______ makes the people in Shanghai proud is _______ they have achieved a lot in the past ten years.