We spent 16 glorious days in August        the athletes’ joys and tears, and we were amazed at their ability.

A．shared         B．to share         C．sharing         D．share

There you can see beautiful tall buildings on       side of the square.

A．all         B．either        C．both          D．every

If a computer crashes, you will lose the file you           on unless you save it regularly.

A．are working          B．work           C．will work            D．worked

Each of us,          old or young, is a valuable member of society.

A．however        B．whenever           C．whoever          D．whatever

We         last night, but we went to appreciate the flowerbeds and streetlights in Tiananmen Square instead.

A．might study         B．could study     C．should have studied     D．must have studied

In September 2008, China’s key milestone in space travel       when Zhai Zhigang conducted the first space walk.

A．reached        B．was reached         C．has reached          D．had been reached

This is a city which lives for today while     by its past.

A．surround        B．surrounding         C．surrounded          D．to surround

There is a saying      swimming is a good way to keep fit.

A．which          B．what          C．that        D．where

Private cars are required to turns off roads one out of five weekdays        the traffic pressure.

A．to reduce        B．reducing           C．reduce          D．reduced

There are many kinds of birds in Australia, and over 140 species of snakes, many of

       are extremely dangerous.

A．them       B．which        C．what          D．those