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The villagers were warned ______ the water from the river polluted by the chemical works..
    A. to drink not        B. drinking not      C. not to drink               D. not drinking 

______ permission to hold a party at home, Mary started to write invitations to her friends.

A. Giving            B. To be given              C. Having given      D. Having been given

Generally, the electric-bike is not dangerous as ______, if ______ according to the instructions.

A. reported; ridden       B. reported; riding  C. reporting; to ride  D. reporting; to be ridden

______ the youth ______ the rising sun, Mao Zedong expressed his great hope for the youth.

A. Comparing; with       B. Compared; to     C. Compared; with      D. Comparing; to

— Why was the summit (高峰會談) held?   

— ______.

A. Deal with the global warming.               B. To deal with the global warming.

C. Dealing with the global warming.    D. To have dealt with the global warming.

______ made his mother worried.
A. The child was addicted to playing computer games
B. The child’s being addicted to playing computer games
C. The child’s being addicted to play computer games
D. The child addicted to playing computer games

With his lips still _______ ，he couldn’t say a word．
       A．trembling    B．tremble   C．to tremble    D．to be trembling

Coming into the room, I found them________ at the table, __________ chess

   A. seated; playing    B. seating; playing  C. seat; play  D. seated; played

He reads newspapers every day to keep himself      about what's going on in the world.  

A. inform            B. informing          C. informed          D. being informed

I appreciated ____ the opportunity to study abroad two years ago.

A. having been given   B. having given  C. to have been given  D. to have given