![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
Because of the complexity of our modern machine, we need our workers ______. A. to tra
Because of the complexity of our modern machine, we need our workers ______.
A. to train special
B. specified in training
C. to have specified training
D. training specially
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)