问题
选择题
It is rather difficult to make friends with her, but her friendship, ____ , is truer than any other's. [ ]
A. while gaining
B. after gaining
C. when to gain
D. once gained
答案
D
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It is rather difficult to make friends with her, but her friendship, ____ , is truer than any other's. [ ]
A. while gaining
B. after gaining
C. when to gain
D. once gained
D