单项选择题

It is a kind of illness that can result in total blindness if ____

A．to leave untreated
B．is left untreated
C．leaving untreated
D．left untreated
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单项选择题
She married a very nice young architect from Belfast， ____ she met on a bus during her journey to Northern Ireland.
A．who
B．when
C．which
D．where
单项选择题
While many people may refer to up-to-minute news， it is unlikely that television and the Internet ____ the newspapers completely.
A．will replace
B．replace
C．are replacing
D．have replaced
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