单项选择题

This was a piece of news of great importance to every man and woman who_______ waiting anxiously outside the building.

A．were
B．has been
C．have been
D．was
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单项选择题
Many elderly people are suffering from the_______disease, rheumatism, as a consequence of the high humidity there.
A．acute
B．cute
C．slow
D．chronic
单项选择题
How many_______known altogether
A．species of fishes are
B．species of fish is
C．specieses of fish are
D．species of fish are
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