The study surveyed 500 families and found the main   problem people suffered was tiredness, followed by loneliness and anxiety.
A．domesticB．publicC．psychological D．biological
C
詞義辨析。  A．國內(nèi)的 B．公共的     C．心理學(xué)的；精神上的   D．生物的；生物學(xué)的。句意：這個研究調(diào)查500個家庭，發(fā)現(xiàn)人們?nèi)淌艿闹饕木駟栴}是疲勞，其次是孤獨(dú)和焦慮。故選C。
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