the editor at once sent the journalism a fax instructing him to f_英语解答

the editor at once sent the journalism a fax instructing him to find out the exact .
请问这里的instructing 做什么成分

人气：251 ℃　时间：2020-04-10 20:46:29

解答

修饰、解释"fax"
sent the journalist a fax (that)instructing him
作定语