单项选择题

One of the boys in the class had a fever and he soon ______ other children.

A．infected
B．effected
C．affected
D．perfected
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单项选择题
The president ______ a rise in salary for ages, but nothing has happened yet.
A．promised
B．is promised
C．has been promising
D．is promising
单项选择题
It was not until she had arrived home ______ she remembered her appointment with the doctor.
A．that
B．when
C．and
D．where
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