GWD17-33（看过帖子，仍有疑问）

33. GWD17-Q33:

Doctors hope that one day the body’s master cells, called stem cells, can be directed to grow in organs or tissues appropriate for transplant, use them to test drugs and potentially toxic chemicals, and may study them to gain insight into basic human biology.

1. transplant, use them to test drugs and potentially toxic chemicals, and may study them
2. transplant, using them to test drugs and potentially toxic chemicals, and studied
3. transplant, used to test drugs and potentially toxic chemicals, and studied
4. a transplant, use them for testing drugs and potentially toxic chemicals, and for studying
5. a transplant, used to test drugs and potentially toxic chemicals, and may study them

答案C，但是这里的used to ...和studied 不会引起歧义吗？因为跟在transplant后面，会不会被理解为修饰transplant呢？

平行结构～～～～

如果修饰transplant，则不需要逗号。

恩~~~脑子做晕了~~

谢谢^-^

OG10第141题中，transplant为可数名词，

141. Unlike transplants between identical twins, whose genetic endowment is the same, all patients receiving hearts or other organs must take antirejection drugs for the rest of their lives.

(A)  Unlike transplants between identical twins, whose genetic endowment is the same

(B)  Besides transplants involving identical twins
                with the same genetic endowment

(C)  Unless the transplant involves identical twins
                who have the same genetic endowment

(D)  Aside from a transplant between identical twins with the same genetic endowment

(E)  Other than transplants between identical twins,
                whose genetic endowment is the same

所以我的选择是E，and may study them修饰doctors

OG10第141题中，transplant为可数名词，

141. Unlike transplants between identical twins, whose genetic endowment is the same, all patients receiving hearts or other organs must take antirejection drugs for the rest of their lives.

(A)  Unlike transplants between identical twins, whose genetic endowment is the same

(B)  Besides transplants involving identical twins
    with the same genetic endowment

(C)  Unless the transplant involves identical twins
    who have the same genetic endowment

(D)  Aside from a transplant between identical twins with the same genetic endowment

(E)  Other than transplants between identical twins,
    whose genetic endowment is the same

所以我的选择是E，and may study them修饰doctors

這題重點是句意

use 必須要有動作者, Doctors已經被拿去做hope的動作,後面的主動表達會有作用者的疑慮

stem cells不會自己use them(又是指自己) to test..

因此A,B,D表主動的use必錯

E句尾的may study them也錯,因為stem cells不會study them