单项选择题

When our university laboratory bought this microscope we were given a one year's ______.

A．reservation
B．security
C．proof
D．guarantee
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单项选择题
Peter ______ his breath in wonder when he saw the Christmas tree in the sitting room.
A．kept
B．held
C．blew
D．grasped
单项选择题
We know she was always as ______ as her word, so we trusted her.
A．good
B．honest
C．faithful
D．true
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