单项选择题

The students didn"t manage to work out the problem ______ their teacher had explained how.

A．when
B．until
C．unless
D．as
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单项选择题
—Could I borrow your dictionary—I d get it for you ______ I could remember who last borrowed it.
A．except that
B．if only
C．only if
D．unless
单项选择题
______, people can t afford to buy expensive things.
A．With the prices of daily goods going up
B．With the prices of daily goods gone up
C．The prices of daily goods go up
D．With the prices of daily goods go up
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