用单词的适当形式填空。

(above, for, across, history, serve, double, possible, enter, build, be)

                                                   The Channel Tunnel (英吉利海峡隧道)

     In 1858, a French engineer, Aime Thome de Gamond, arrived in England with a plan for a twenty-one

mile tunnel    1    the English Channel. He said that it would be    2    to build a platform in the center of the

Channel. This platform    3    as a port and a railway station. The tunnel would be well-ventilated (通风好的)

if tall chimneys were built    4    sea-level (海平面). In 1860, a better plan was put forward (提出) by an

Englishman, William Low. He suggested that a    5    railway tunnel should be built. This would solve the

problem of ventilation,    6    if a train    7    this tunnel, it would draw in (吸入) fresh air behind it. Forty-two

years later a tunnel was actually begun. If, at the time, the British had not feared invasion (入侵), it would

have been completed. Recently, there has again    8    great interest in the idea of a Channel Tunnel.

If it    9    , it will connect (连接) Britain to Europe for the first time in     10   .

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