单项选择题

Many scientists have been probing psychological problems.

A．solving
B．exploring
C．settling
D．handling
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单项选择题
The food is insufficientfor three people.
A．instant
B．infinite
C．inexpensive
D．inadequate
单项选择题
Thousands of people perishedin the storm.
A．died
B．suffered
C．floated
D．scattered
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