单项选择题

Only when you have completed the basic English course ______ be permitted to take the advanced courses.

A．you can
B．can you
C．you will
D．that you
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单项选择题
The ______ of finding gold in California were good in the 1840's.
A．proposals
B．promises
C．prospects
D．privileges
单项选择题
An investigation was made into the accident, ______ fifty people were killed.
A．for that
B．when
C．where
D．in which
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