单选题
Some of them were well behaved, ______ were insulting.
A、
and they
B、
but they
C、
while others
D、
as others
【正确答案】
C
【答案解析】
考查并列句。while表对比和转折，well-behaved(表现好)与insult(侮辱)为反义词，因此两个句子为转折的语义走向。故答案为C。
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