《寡人之于国也》采取的推理方法是( )
A．对比推理
B．假设推理
C．比喻推理
D．连锁推理
参考答案：D
He is rather difficult to make friends with, but the friendship of his, _____, is truer than that of anybody else’s.
A．while gained
B．when to gain
C．after gaining
D．once gained
