是on telephone还是on the telephone还是on a telephoe;;;

on the telephone还是on telephone 是on the telephone还是in the telephone on the telephone ?on telephone? They talked on the telephone 是用in还是用on hold on the telephone 意思. get on the telephone 意思 on the telephone 介词为什么用on There is a telephone m_____ for you on the desk he____when we spoke on the telephone yesterday.A.was sounded 1.on the telephone 用法是什么? hurry,Marry,you（ ） on the telephone 电话中的那位是谁?who is that on the telephone?介词是用on吗?