问题
选择题
________ both sides accept the agreement will a lasting peace be established in this region.[ ]
A. If only
B. Only if
C. Unless
D. As long as
答案
答案：B
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________ both sides accept the agreement will a lasting peace be established in this region.[ ]
A. If only
B. Only if
C. Unless
D. As long as
答案：B