请教大家，本人有几道题弄不懂！！

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1.The most common reasons for an employee’s unwillingness to accept a transfer are that mortgage rates are high,housing in the new location costs more,and the difficulty of selling the old home.



A .that mortgage rates are high,housing in the new location costsmore, and the difficulty of selling the old home.

B .that mortgage rates are high,housing in the new location costs more,and that it is difficult to sell the old home

C.high mortgage rates,the greater cost of housing in the new location,and that the old home is diffcult to sell

D .high mortgage rates,the greater cost of housing in the new location,and it is diffcult to sell the old home

E .high mortgage rates,the greater cost of housing in the new location, and the difficulty of selling the old home

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2.Unlike the acidsmoke of cigarettes,pipe tobacco,cured by age-old methods,yields an alkaline smoke too irritating to be drawn into the lungs



A.Unlike the acidsmoke of cigarettes,pipe tobacco,cured by age-old methods,yields an alkaline smoke

B. Unlike the acidsmoke of cigarettes,pipe tobacco is cured by age-old methods,yielding an alkaline smoke

CUnlike cigarettes tobacco,which yields an acid smoke, pipe tobacco, cured by age-old methods,yields an alkaline smoke

D. Differingfrom cigarettes’ acid smoke, pipe tobacco’s alkaline smoke, cured by age-old methods,is

E. The alkaline smoke of pipe tobacco differs from cigarettes’ acid smoke in thatit is cured by age-old methods and is



3.Quasars are so distant that their light has taken billions of years to reach the Earth;consequently,we see them as they were during the formation of the universe



A. we see them as they were during

B. we see them as they had been during

C. we see them as if during

D. they appear to us as they did in

E. they appear to us as though in





4.Astronomers at the Palomer Observatory have discovered a distant supernova explosion, one that they believe is a typer previosly un kown to science.



A that they believe is

B that they believe it to be

C they believe that it is of

D they believe that is

E they believe to be of



5 In addition to having more protein than wheat does,the protein in rice is higher quality than in wheat,with more of the amino acids essential to the human diet



A.the protein in rice is higher quality than in

B.rice had protein of higher quality than that in

C.the protein in rice is higher in quality than it is in

D.rice protein is higher in quality than that it is in

E.rice has a protein higher in quality than

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1.E
2.C
3.A
4.E
5.B

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麻烦大家逐个选项给一下讲解，第一题B为什么错，第二题A为什么错