(2014·烟台市第二次诊断)Vitamin D helps our bodies make a special chemical，and this special chemical，________，affects our brains，making us feel happy.
A．in turn B．in particular
C．in advance D．in short
(2014·湖南省邵阳市模拟)Some of us remain________at our computer for hours every day，forgetting moving our body.
A．seating B．seated
C．sat D．sit
(2014·苏锡常镇四市调研)—As a teenager，our son should have two or three hobbies to be really happy.
—________，but how can he afford the time with so much homework every day?
A．So does he B．So he does
C．So should he D．So he should
(2013·湖南省重点中学3月联考)We pursue happiness，thinking one day we will find it.But_________it by seeking it.
A．rarely will we find B．rarely we will find
C．rarely will find we D．rarely find we will
(2013·厦门质量检测)Some fruits are so easily harvested in this area that they are never of great________.
A．fare B．benefit
C．help D．worth
(2014·河北教学质量检测)Many people tried to leave the country，________there was much violence and a serious shortage of food supply.
A．where B．which
C．that D．what
