Now that energy prices are rising so rapidly, further prices are very uncertain, and the risk _____ a new investment depending on them may fail is greater.

              A．that              B．by which             C．at which              D．in that

---- Can you think of a case in which the ecology of an area is in balance?

  ---- Sure. You see, ______ an environment is undisturbed, the ecology of the area is in balance.

A．unless                        B．as                       C．though                D．where

________ by the provincial government, post-disaster restoration and reconstruction work should be carried out on the basis of “seeking truth from facts”.

           A．Being demanded                              B．Demanding                

           C．Demanded                                       D．To be demanded 

 In order to search for the escaped prisoner, the police decided to question _____ comes along the road.

A．who    B．whom        C．whoever         D．whomever

If something that requires imagination needs _____, a robot is useless.

       A．being done           B．to do                   C．be done               D．doing

In 1800, a group of adventurers set out on their exploring trip. Five days later, they came to _______ is now known as Quebec.

           A．what               B．which                 C．the place             D．where

Just watch carefully now. I’ll show you one of the most remarkable photographs ______.

       A．having ever been taken                         B．had ever been taken

       C．ever being taken                                  D．ever taken

At parties, girls like to help themselves to ice cream and candies rather than wait ____________.

       A．to serve                                              B．to be served           

       C．served                                                D．being served

Sandy could do nothing but ______ to his teacher that he was wrong.

       A．admitting            B．admitted        C．admit       D．to admit

The news that volunteer workers will go to homes for the aged ______ now.

       A．is being talked about                             B．are being talked about

       C．is being talked                                      D．are being talked