单项选择题

Many local people were deeply concerned about the nuclear leakage,________was still kept secret.

A．the cause of that
B．and the cause of which
C．the cause of which
D．which cause
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单项选择题
How long________since I bumped into you and your sister at McDonald
A．is it
B．was it
C．had it been
D．has it been
单项选择题
Although________in a religious family, he did not believe in God at all.
A．grown
B．cultivated
C．raised
D．bred
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