单项选择题

The entire family is ______ in scientific research.

A．dipped
B．immersed
C．saturated
D．submerged
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单项选择题
She is a very ______ student. She's always talking about traveling to outer space.
A．imaginary
B．imaginative
C．imaginable
D．imagining
单项选择题
The bed has been ______ in the family. It was my great-grandmother's originally.
A．handed out
B．handed over
C．handed down
D．handed round'
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