单项选择题

Although they plant trees in this area every year, the tops of some hills are still ______.

A．blank
B．hollow
C．vacant
D．bare
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单项选择题
The Eskimo is perhaps one of the most trusting and considerate of all Indians but seems to be ______ the welfare of his animals.
A．critical about
B．indignant at
C．indifferent to
D．Subject to
单项选择题
American football and baseball are becoming known to the British public through televised ______ from the United States.
A．transfer
B．deliveries
C．transportation
D．transmissions
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