We should set up more cultural parks the old can enjoy themselves.
Mrs. Green went back home hurriedly, where her two little twins were crying, _____ they were hungry.
Parents have a duty to ____ their children from the harmful effects of the Internet.
Qiandao Lake, widely known ______ a tourist site, is famous _____ its clear and drinkable water.
We have every reason to believe that __________ 2012 London Olympics will be ________ great success.
—Madam, could you please tell me how to get to the nearest post office? —_______