单项选择题

Although he was ill,______ he went on working.

A．but
B．yet
C．and
D．while
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单项选择题
When she heard the news, her hope ______disappointment.
A．got
B．turned in
C．turned to
D．felt
单项选择题
—Mark broke his leg when he was playing football.—______was that
A．Since when
B．Since when ago
C．How long
D．How long ago
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