Six miners(矿工)were excavating(挖掘)coal in a deep mine.Suddenly,
the mine fell down and the exits were blocked.By experience,they knew the biggest problem was the lack of oxygen.The air in the mine could only keep them alive for three hours.
　　
Among the six miners,onlyJack had a watch.So they madeJack tell them the time every half an hour.When the first half of an hour passed,Jack said,
“Half an hour passed."He worried because he knew that he was telling them how far they were from death.Then Jack got an idea.He decided not to make his friends die so painfully.The second half of an hour passed,but he said nothing.When another fifteen minutes passed,he said,“An hour already.”In fact,it had passed75minutes.When another hour passed,Jack said,“Another half an hour.”The other five miners all thought that only90minutes had passed.Only Jack knew that135minutes had already passed.
　　Four hours after the accident,rescuers(救援者)came.To their surprise,
five of the miners were still alive and only Jack died.
　　This is the powerof faith.Jack gave hope to his friends.However,he died because he knew the truth.
1.The reading above mainly tells us________.
　
A.how the accident happened
　
B.why the miners had three hours to last

C.one miner gave hope to his friends to live
　　　　
D.six miners helped each other to stay alive
　　　2.The biggest problem in the mine was the________.
　　　　
A.water B.space C.food D.air

1.C 2.D