单项选择题

Many countries face some serious problems of land use, ______ result from population growth and the demands of modem technological living.

A．which most
B．most of which
C．most which
D．of most which

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单项选择题

Why did Bob Parks radio wake him up 1 2 hour earlier than usual()

A．The electricity had gone off during the night.
B．Bob had set the alarm wrong.
C．Bob did not want to be late.
D．The Internet had informed the radio of a traffic jam.

单项选择题

In which case mentioned in the passage would an automatic language translator be helpful()

A．A medical emergency.
B．Police action.
C．Traveling.
D．All of the above.