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1.This river is so big that it is impossible to build a ___B

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1.This river is so big that it is impossible to build a ___B____ under it without modern technology.
A.canal B.tunnel C.channel D.cable
D答案中cable有海底电缆的意思,为什么不可以选它?
2..Professor Smith is also the __ D _____ of the international program office.If you have any problem when you study here,you may go to him for help.
A.detective B.president C.manager D.director
这题中为什么不能选B和C呢?
3.Students with ___ B ____ problems may apply for student loans.
A.economic B.financial C.male D.economical
B和D有何区别?
4.Richard’s news report covering the conference was so _____ that nothing had been omitted.( B)
A) comprehensive B) integrated C) redundant D) productive
Integrated有综合的,完整的意思 ,为什么这里不选B?
1.Cable 一般用作电线/电缆 很少有人会理解为海下的光缆(fibre optic cable or wiring cable)
2.环境已看就是学校,学校里面很少用manager管理人,president校长(有问题就去问校长不太符合常理)
3.B是说有经济困难的意思,economical一般用作经济学术上的
4.要是我的话我选A,Integrated有把东西组合到一起的意思,这里用comprehensive全面 更舒服