With so many orphans ________，the charity organization calls for more donations.

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

—This morning your mobile phone was always busy. I couldn’t ________ to you until several attempts.

—Oh, I’m sorry. I was discussing the price of our products with a client over the phone.

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

Green economy offers a new model ________ people could both protect the climate and develop the economy, according to what Li said at the International Cooperative Conference on Green Economy and Climate Change.

________, but the idea of having to work more than ten hours a day without weekends discouraged me.

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

________five minutes________ before the last train left, we arrived at the station. 

— Is Bob still performing?

— I’m afraid not. He is said ________ the stage as he has become an official.    

—What’s made Tommy so upset?

— ________the game. It shocked him so much.