完形填空中的 并且具体的解释为什么要这么选哦
There is more good_9_for people who have friends.They live longer than people who don't.Why?It_10_be that they are happier.Being happy helps you stay well.Or it could be just knowing thay someone cares.If someone cares about you,you take better care of yourself.
( )9.A.confidence B.thought C.knowledge D.news
( )10.A.must B.should C.could D.need