The aging population in China will greatly _______ the whole society.

After entering the meeting hall, Mike _______ a friend and went over to greet him.

__________ a terrible storm would attack the old town.

_________ impressed the visitors was _______ the trees were so tall in Vancouver.

The meeting started at ten o’clock, but the chairman has not _________ yet.

 ---- Liu Qian has just come back from Canada and she looks very excited.

---- She ________ her trip very much.

As we know, the 2010 Word Cup _______ in South Africa on June 11, 2010.

They will move to a new apartment next month. It is _________ the one where they are living now.

We must do something to ________ the factories sending out poisonous gases so as to keep the city clean and beautiful.

They did the experiment in the lab _______ was named after Professor White.