GWD-17-33

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

我选B, 答案是C

句子结构应该是：master cells can be directed...and (be) studied... 所以A, D, E顺利排除；

但是C中：    transplant, used to test....的逻辑意义变为：用被移植体测试drug.... ；个人认为逻辑不正确

因而选B。 请大家一起讨论讨论！

这道题似乎是在考查动词的分词形式在句子中的作用，看了帖子，楼上说used to ... , and studied to是和be
directed to平行的结构。

我有不同的看法，我觉得它们是和appropriate for transplant平行，共同修饰organs or
tissues的。

有想法吗？

我也选错了,后来看了半天终于明白了,其实是3个词并列:

can be directed...used...,and studied...

果然是逻辑意思优先啊.仔细,仔细,再仔细!