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求新概念2,64课作文的答案!

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求新概念2,64课作文的答案!
The Channel Tunnel
The tunnel,which the French engineer,Aime Thome,planned to build under the English Channel in 1858,would be ventilated by tall chimneys built above sea level.An Englishman,William Lowe,suggested a better plan two years later.Passing trains would solve the problem of ventilation in his proposed double railway-tunnel because they would draw in fresh air behind them.Though work began forty-two years later,it was stopped because the British feared invasion.However,the tunnel was officially opened on March 7,1994.