It has lost its primary oxygen sources．,It has lost its-找考题网

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A．It has lost its primary oxygen sources.
B．It has lost its backup oxygen sources.
C．It has lost both the primary and the backup oxygen sources.
D．It has lost neither the primary or the backup oxygen sources.

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单项选择题

A．Suspected Muslim militants.B．Suspected Algerian militants.C．Suspected Islamic civilians.D．Suspected Algerian civilians.

A．Suspected Muslim militants.
B．Suspected Algerian militants.
C．Suspected Islamic civilians.
D．Suspected Algerian civilians.

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The Tower of London, a historical sight, located in the centre of London, was built by ______.

A．King Harold
B．William the Conqueror
C．Oliver Cromwell
D．Robin Hood

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