问题
选择题
—Talking loudly in a library is impolite.
—In fact, we should also take care not to cough or sneeze loudly in public.
A．look after
B．be careful
C．take care of
D．look up
答案
答案：B
短语辨析。look after照顾；be careful小心；take care of照顾；look up向上看，查阅。句意：在图书馆大声说话是不礼貌的。——实际上，在公众场所，我们也应该小心不要咳嗽或者打喷嚏。故选B。