请教GWD17-Q33

meowlac

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.

A.    transplant, use them to test drugs and potentially toxic chemicals, and may study them

B.    transplant, using them to test drugs and potentially toxic chemicals, and studied

C.    transplant, used to test drugs and potentially toxic chemicals, and studied

D.    a transplant, use them for testing drugs and potentially toxic chemicals, and for studying

E.     a transplant, used to test drugs and potentially toxic chemicals, and may study them

请NN给我讲下这道题吧，还有C中的 used的逻辑主语是谁呢？transplant?还是cells  我怎么觉得怪怪的 这道题没有理解意思。。

盆子要革命

逻辑主语是cells    不可能是“移植”去被use and study   根据其他错误答案的them 也可以推出是cells

hlp1222

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, used them to test drugs and potentially toxic chemicals, and studied them to gain insight into basic human biology.

这道题考的貌似是平行结构吧

baoguangya

翻译成中文后大家很轻松就可以理解它了：

医生们希望，有一天人体的主细胞，即干细胞，可以被定向生长为适宜移植的器官或者组织，可以被用于测试药物和潜在毒物，并且可以被研究以获得对基础人类生物学的认识。

sunny8843

up

vivian128

d