________by a group of children，the old man was delighted.

When he looked up，he suddenly found himself________by a group of teenagers，________looked at him anxiously.

Mr. Smith’s doctor suggested him_______ cold food these days.

I felt greatly honored ____ when I took part in my friend’s birthday party.

The first thing ________ I did was to see if there were any products ________ might help me, but there only seemed to be powders ________ to kill snakes.

_______ from the top of the mountain, we found the city more beautiful.

The patent officer ______ with my file explained to me that a plant variety is not a/an _______ invention as it is a result of adjusting growth scientifically.

Seeing the picture, I couldn’t resist ______the days_____ we spent together.

The plan to be carried out next month needs _______ among the members of the labor union before _________ . 

With the financial crisis _____ across the globe, a lot of companies have shut down and many people have been out of work. 

When water is boiling, steam can be seen ______ from it.

      the coming English speech competition will be a lot of work, so I need some volunteers to help out.

Nearly all the people        believe confidence is the key to success.

While you are hurrying to the airport, _______in a heavy traffic jam in a taxi is quite an unpleasant experience．

I don’t think it easy, even if we work hard,           the South Korea and the North Korea to sit down to talk at present.

After a long absence, I went back to college, ______ to pick up where I'd left off．

Wang Feng’s _________ our school at the English speech contest proved to be a success.

Do you think it _________ to argue with them? The question is not worthy_________.

—Your brother was brave enough to tell the truth in public. ---Yes, and he will never regret_________ that. I admire him so much.

The best way Tom thought of_________ his strength is to run for 30 minutes every day.