GMAT语法

141.★★

Thefederalrulesaimedatprotectinghumansubjectsofmedicalexperimentswereestablishedtoensurethatpatientsmustbewarnedofpotentialrisksandanindependentpanelwouldevaluatetheexperimentbeforeitwasconducted.

(A)mustbewarnedofpotentialrisksandanindependentpanelwould

(B)mustbewarnedofpotentialrisksandthatanindependentpanel

(C)arewarnedaboutpotentialrisksandthatanindependentpanel

(D)willbewarnedaboutpotentialrisksandanindependentpanelwould

(●)wouldbewarnedofpotentialrisksandthatanindependentpanelwould

不是说must是强烈语气,原文有,答案中就有,为什么这题不行?的确,E中,and前后更对称；可是语气改变了啊.wouldbe感觉没mustbe强；请教高手!

150.★★

Thecomputercompanyhasannouncedthatitwillpurchasethecolor-printingdivisionofarivalcompanyfor$950million,whichispartofadealthatwillmakeitthelargestmanufacturerintheofficecolor-printingmarket.

(A)million,whichispartofadealthatwillmake

(B)million,apartofadealthatmakes

(C)million,partofadealmaking

(D)millionasapartofadealtomake

(●)millionaspartofadealthatwillmake

我选的是B,答案给的是E,请教为什么?你们是如何解的?

151.★★

Likethethornyballooningofafrightenedpufferfishorthesuddenappearanceofangrysapphirehoopsforwhichtheblue-ringedoctopusisnamed,sotheCalifornianewt'sdisplayofitsredunderbellyisaclearwarningthatpredatorsignoreattheirperil.

(A)sotheCalifornianewt'sdisplayofitsredunderbellyisaclearwarningthatpredatorsignoreattheirperil

(B)soitisattheirperilthatpredatorsignoretheCalifornianewt'sdisplayofitsredunderbelly,aclearwarning

(C)theCalifornianewt'sdisplayingitsredunderbellyisaclearwarningforpredators,sotheyignoreitattheirperil

(●)theCalifornianewt'sdisplayofitsredunderbellyisaclearwarningthatpredatorsignoreattheirperil

(E)itisattheirperilthatpredatorsignoretheCalifornianewt'sdisplayofitsredunderbelly,aclearwarning

别的句子里没sothat的含义啊；新东方不是说sothat的含义如果句子有,答案就有,如果A中没有,答案不一定有么?我是看到sothat后就直接在AB里选,看B错的离