It is rather difficult to make friends with him, but his friendship, _________ is more true than any other's. [ ]
A. once gained
B. When to gain
C. After gaining
D. While gaining
答案:A
It is rather difficult to make friends with him, but his friendship, _________ is more true than any other's. [ ]
A. once gained
B. When to gain
C. After gaining
D. While gaining
答案:A