单项选择题

It is most desirable that he ______ the conference.

A．attend
B．will attend
C．should attend
D．can attend
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单项选择题
______ no coffee left, they had to make do with tea.
A．There being
B．It being
C．It was
D．There was
单项选择题
While discovering the cause of a serious illness, ______.
A．the patients should be taken good care of
B．the effective measures should be taken
C．the illness should be cured immediately
D．the doctor should give the patient good care
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