单选题
What does the author say about social networks?
A、
They have effects similar to those of a marriage.
B、
They help develop people"s community spirit.
C、
They provide timely support for those in need.
D、
They help relieve people of their life"s burdens.
【正确答案】
A
【答案解析】
由all kinds of social networks have similar effects可推断选择A项。很显然这里的similar effects指的是marriage"s effects。故答案为A。
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