仔细阅读部分：

　　选词填空： 47.tend 48.sufficient 49.efficiently 50.associated 51.attracting 52.alert 53.definitely 54.younger 55.continuing 56.different1

　　选项部 ： 57 . D) Interracial lodging may have diverse outcomes

　　58 .D) Being surrounded by white peers motivates a black student towork harder to succeed

　　59 A)Interracial roommates are more likely to fall out

　　60 . D)The school randomly assings roommates without ragard to race

　　61 A) It is unscientific to make generalizations about it without further study

　　Passage Two

　　62 B) Rates of death from illnesses have risen due to global warming

　　63 A)It was challenged by some climate and risk experts

　　64 B)It is invalid in terms of methodology

　　65 D)Its rough estimates are meant to draw the attention of world leaders

　　66 D)How rich countries can better help poor regions reduce climate hazards