单项选择题

Some women, particularly those over 35 years of age, seem to be more ______ more serious problems such as clots in veins if they smoke heavily.

A．blamable
B．attributable to
C．vulnerable to
D．responsible for
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单项选择题
Without a sensible sex education all kinds of strange and fantastic ideas will ______ .
A．take pains
B．take leave
C．take heart
D．take root
单项选择题
The early morning ______ of the picnic area is replaced by the smell of the barbecue and the sounds of conversation and children running and playing.
A．cessation
B．luxury
C．vacancy
D．tranquility
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