单项选择题

Air France has made such a decision because ______.

A．it has received terror alerts
B．there is no evidence of any terrorist attack
C．it is facing pressure from the U. S.
D．it has invited cooperation from the U. S.

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单项选择题

The speaker compares the Earth to a spaceship because ______.

A．both have a limited supply of resources
B．the Earth moves around the sun like a spaceship
C．we can travel to outer space
D．the Earth never stops moving

单项选择题

Where can you find an area code map of the U. S.

A．On the first page of the telephone book.
B．At the end of the telephone book.
C．In the front of the white pages.
D．Right after the white pages.