2. 外语
  3. ______ both sides accept the agreement ______ a lasting peace be established in this region.

______ both sides accept the agreement ______ a lasting peace be established in this region.

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问题 ______ both sides accept the agreement ______ a lasting peace be established in this region.
选项 A、Only if; will
B、If only; would
C、Should; will
D、Unless; would
答案A
解析 倒装句题。从题干形式可知本句为主从复合句，主句用了倒装形式。当only if放在句首，后接状语时，主句倒装。if only不能连接从句。should放在句首，只出现在省略if的虚拟语气倒装的情况中，而这句话没有用虚拟语气。unless引导状语从句时，主句为陈述语序，不需要倒装。
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