问题补充:
单选题Heisratherdifficulttomakefriendswith,buthisfriendship,____,ismoretruethananyother.A.once gainedB.when to gainC.after is gainedD.while gaining
答案:
A解析once gained是状语从句的省略, 相当于once it is gained。
时间:2019-07-16 11:50:33
单选题Heisratherdifficulttomakefriendswith,buthisfriendship,____,ismoretruethananyother.A.once gainedB.when to gainC.after is gainedD.while gaining
A解析once gained是状语从句的省略, 相当于once it is gained。