The father stood up in order to protect his 15-year-old son, saying that he was not the one         .

— Is Bob still performing?
— I’m afraid not. He is said ________ the stage as he has become an official.    

________ around the Water Cube, we were then taken to see the Bird’s Nest for the 2008 Olympic Games.

________in a heavy traffic jam in a taxi while you are hurrying to the airport is quite an unpleasant experience．

Many early Europeans, ________ the earth to be flat, feared that Columbus would fall off the edge of the earth.

That could set off a “credit event,” ______ world financial markets into turmoil（混乱）, much as the collapse(倒闭) of Lehman Brothers ______ in the fall of 2008.

—Do you mind __________ alone at home?
— Not at all. She is old enough to take care of herself.

—Would you like to go to the cinema with me tonight?
— I’d like to, but it remains ________ whether I can finish my homework in time.

________ from his looks, he is a kind man.

______ that it was going to snow, the climbers decided to put off their attempt on the highest peak.