A salty diet may increase the risk of stomach cancer ________ 10 percent, South Korean researchers found in a study of more than 2 million people．
| A．at | B．to | C．by | D．for |
The Olympic Games，________in 776 BC, did not include women players until 1912.
| A．first playing | B．to be first played |
| C．first played | D．to be first playing |
As a young man, Comrade Zhou Enlai ________the student's movements and later ________the Communist Party of China.
| A．joined; take part in | B．took part in; joined |
| C．joined in; took part in | D．joined; joined in |
Actually, information technology can ________ the gap between the poor and the rich because all can get what they want at the same time.
| A．break | B．line | C．bridge | D．combine |
He telephoned the travel agency to ________ three air tickets to London.
| A．order | B．arrange | C．take | D．book |
I'm tired out.I ________ all afternoon and I don't seem to have finished anything.
| A．shopped | B．have shopped |
| C．had shopped | D．have been shopping |