_____wepromisecontinuousincreaseinruralincomes_____improvethewholepeople'

_____we promise continuous increase in rural incomes _____improve the whole people's well-being．A.Only if; we can B.If only; can weC.Only if; can weD.Unless; we can

C解析试题分析：句意：只有我们承诺不断地增加农村地区人们的收入，我们才能够提高整个人们的幸福感。Only if只有，位于句首时主句要部分倒装。If only要是…该多好啊！故选C.考点：Only的倒装点评：only所修饰的副词、介词短语或状语从句位于句首时，要用倒装语序。如：Only then did I realize the importance of health.到那时我才认识到健康的重要性。注意：only修饰主语时，句子不需要倒装。Only he knows the truth.只有他知道真相。

哦，回答的不错