单项选择题

The old lady has developed a ______ cough which cannot be cured completely in a short time.

A．perpetual
B．permanent
C．chronic
D．sustained
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单项选择题
I would have gone to the lecture with you ______ I was so busy.
A．except that
B．provided that
C．but that
D．only that
单项选择题
Then in June 1967 the country ______ diplomatic relations with Israel after the outbreak of the Six Day War.
A．broke away
B．broke off
C．cut out
D．cut down
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