[讨论]GWD-17-33

GWD-17-33:

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.

C应该是be directed，be used和be studied平行。

used和studied前面的be省略

恩，平行原则还是很重要的考点

transplant 在这里是名词？

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

ABDE逻辑错误，后面整个都是在that从句之下，从句主语是cells， cells use错；celles不能自己use自己 ：）

E 若把may study 看作与从句并列，则cells自己不能study；

如果把may study看作与主句并列，则used前面应该有and连接才对

但是为什么C省略了may？？

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

ABDE逻辑错误，后面整个都是在that从句之下，从句主语是cells， cells use错；celles不能自己use自己 ：）

E 若把may study 看作与从句并列，则cells自己不能study；

如果把may study看作与主句并列，则used前面应该有and连接才对

但是为什么C省略了may？？