be called on to

• prep. 要求(用来)

be called on to的用法和样例：

例句

用作介词 (prep.)

1. Jack was called to account for the missing cash.
   杰克被要求对这笔遗失的现金作出解释。
2. He had the impertinence to demand a raise.
   他竟冒失地要求增加工资。