“Calling once，calling twice，last calling”（翻译)（)。

A．calling onB．calling forC．calling offD．calling in

【C4】______A．calling offB．calling forC．calling uponD．calling up

Third－country calling refers to ______.A．calling via another countryB．finding a person in

He is______an important customer now and he will be back tonight.A．calling onB．calling upC

55._________A..calling onB..calling forC. calling

Women all over the world are ______ equal pay for equal jobs.A.calling onB.calling aboutC.