摘要：36．Unhappy people spend more than twice as much time thinking about unpleasant events in their lives happy people tend to seek information that brightens their personal outlook. A．when B．as C．until D．while

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Unhappy people spend more than twice as much time thinking about unpleasant events in their lives ________ happy people tend to seek information that brightens their personal outlook．

A.
when
B.
as
C.
until
D.
while

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[　　]

A．when

B．as

C．until

D．while

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Unhappy people spend more than twice as much time thinking about unpleasant events in their lives ________ happy people tend to seek information that brightens their personal outlook．

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