call for ,call on 都有要求的意思,那么下面这题为什么只选call for?A man without patience is unfit for the work because it____patience and carefulness.A calls on B calls for C calls up D calls back

call on , call for, call in ,call up 分别是什么意思? 关于call的几个短语 call on call out call for call in 或者说有什么不同点和相同点? 请问call for与call on的区别?两者都有要求的意思,有什么区别吗? call for call in call on call at 分别是什么意思?怎么用? 英文词组call on .call for. call after. call out分别什么意思? call on call on On Call Call for call on和 visit有什么区别?call on customers wait for your call on my birthday call for war ding on condi call at 和call on 有什么不同? 请问call on和call at有什么区别? call on和call at有什么区别? “call sb on”与“call sb at”有区别吗? “call sb on”与“call sb at”有区别吗? 请问call in,call at,call on都有来访的意思,这三个词有什么区别吗?有例子说明一下更好了.