1.Thisriverissobigthatitisimpossibletobuilda___B____underitwithoutmoderntechnology.
A.canalB.tunnelC.channelD.cable
D答案中cable有海底电缆的意思,为什么不可以选它?
2..ProfessorSmithisalsothe__D_____oftheinternationalprogramoffice.Ifyouhaveanyproblemwhenyoustudyhere,youmaygotohimforhelp.
A.detectiveB.presidentC.managerD.director
这题中为什么不能选B和C呢?
3.Studentswith___B____problemsmayapplyforstudentloans.
A.economicB.financialC.maleD.economical
B和D有何区别?
4.Richard’snewsreportcoveringtheconferencewasso_____thatnothinghadbeenomitted.(B)
A)comprehensiveB)integratedC)redundantD)productive
Integrated有综合的,完整的意思,为什么这里不选B?