在下列各对句子中挑选出更符合逻辑的句子:1)(a)
A.(b) B.2)(a) C.(b) D.Before starting the project,one must obtain E.3)(a) F.Having completed twenty years of service, G.(b) H.Having completed twenty years of service,a gold watch was presented to I.4)(a) J.Sealed in an airtight box,the K.(b) L.Scaled in an airtight box,the fine chee M.Se was savored bv the N.5)(a) O.Emilio was asked to,as soon as possib P.(b) Q.6)(a) R.(b) S.7)(a) T.(b) U.8)(a) V.(b)