单项选择题

Some drugs taken in large quantities can cause permanent brain damage.（）

A．temporary
B．lasting
C．dangerous
D．serious

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单项选择题
There is widespread speculation that he is going to resign.（）

A．general
B．vast
C．secret
D．various
单项选择题
Behind these obvious ridiculous motives to anti-Jewish attitudes there was a deeper cause.（）

A．unreasonable
B．sad
C．reasonable
D．encouraging
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