单项选择题

To drive a car safely, it is ________ good brakes.

A．essential with
B．essential having
C．essential to have
D．essential have
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单项选择题
We hadn’t expected a power cut so we were astonished when the whole house was ________ into darkness.
A．dived
B．plunged
C．drowned
D．dropped
单项选择题
When questioned by the interviewer, my mind went ________, and I could hardly remember my own date of birth.
A．blank
B．dim
C．faint
D．vain
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