单项选择题

(The auctioneer) must know (fair) accurately the current (market values) of the goods he is (selling).

A．The auctioneer
B．fair
C．market values
D．selling
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单项选择题
(A large collection) of contemporary photographs, (including) some taken by Mary (are) on display (at) the museum.
A．A large collection
B．including
C．are
D．at
单项选择题
There (is) much in our life (which) we do nor control (and we are) not even responsible (for).
A．is
B．which
C．and we are
D．for
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