One ________ five will have the chance to join the game.

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All possible means ________. However, nothing can ________ him dying of lung cancer.

[　　]

A．has tried, stop

B．have been tried, keep

C．has been tried, prevent

D．have been tried, stop

Something must be done to ________ young people ________ smoking.

[　　]

Two days were spent ________ the house.

[　　]

________ of the students have been to the Great Wall.

[　　]

We ________ the naughty boy ________ a happy monkey.

[　　]

Smoking is dangerous because it ________ illness, death and fires.

[　　]

The store was ________ in a big fire.

[　　]

I know playing Majiang is ________ of time.

[　　]

Each year, millions of smokers die ________ smoking.

[　　]