Becauseofthecomplexityofourmodernmachineweneedour

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

正确答案：C
Needtodosth需要做某事排除选项B和D副词修饰动词排除选项A选项C是正确的