1 It was in the lab_____ was taken care of by professor Harris_____ they did the experiment.
A.that,where B.which,where
C.which,that D.whom,that

2 As time went on,the theory she had stuck to_____ correct.
A.proved B.to proving C.to proved D.to prove

请附说明

1.C 首先排除D,应为whom是指人的,因此从that和which中选择,但如果你选B或Cthat和which则引导定语从句指代lab,这是可以,但后面填where 这又是一个定语从句指代in the lab有点说不通.所以选C这里which引导从句指代lab ,后面一空填that为强调句.

2.A 这是一个省略句,又是一个定语从句.原句为As time went on,the theory(that )she had stuck to_____ correct.that在这里引导定语从句做主语,我把此句化简一下为the theory _____ correct.显然此空应填谓语,而
B.to proving C.to proved D.to prove 是由to引导的非谓语动词,不能作谓语,只能选A