单项选择题

The underlined phrase "emanate from" in (Sent. 2, Par

A．1) most probably means " ______ ".A. thrive onB. account forC. originate fromD. descend from
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单项选择题
We can infer from this passage that ______.
A．offensive breath can't easily be cured
B．elderly people are less offended by bad breath
C．heavy drinkers are less affected by bad breath
D．offensive breath is less affected by alcohol
单项选择题
Mouthwashes are not an effective cure for bad breath mainly because ______.
A．they can't mask the bad odor long enough
B．they can't get to all the offending bacteria
C．their strong smell mixes with bad breath and makes it worse
D．they can't cover the thick layers of mucus
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