单项选择题

As intriguing as these results are, much remains unclear about the impact of low doses of a low doses of alcohol ______ system.

A．immune
B．vulnerable
C．chronic
D．susceptible
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单项选择题
It is hoped that the prisoner will be released through the ______ of the president himself.
A．intrusion
B．interruption
C．intervention
D．interference
单项选择题
The results showed that attractive males utterly defeated unattractive men, but the women who had been ranked most attractive ______ received the fewest votes.
A．increasingly
B．dominantly
C．ordinarily
D．invariably
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