单项选择题

______, he realized he made the right decision.

A．Before long
B．Long before
C．After
D．Before
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单项选择题
What is the probable relationship between the two speakers
A．Salesman and customer.
B．Expert on jewelry and his wife.
C．Estate agent and client.
D．Husband and wife.
单项选择题
A．experienceB．witnessC．watchD．undergo
A．experience
B．witness
C．watch
D．undergo
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