单项选择题

Don't lose heart. It will not be long ______ you catch up with others.

A．since
B．until
C．when
D．before
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单项选择题
I won't see you off at the airport tomorrow, so I wish you______
A．have a good journey now
B．a good journey now
C．would have a good journey now
D．to have a good journey now
单项选择题
______ the opportunity, he might well have become an outstanding cartoonist.
A．Given
B．To give
C．Giving
D．Being given
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