【正确答案】 B

【答案解析】draft：起草；设计。与formulate(制定)意思相近。We will formulate a policy that will promote rather than hinder peace．我们将制定一项促进和平而不是阻碍和平的政策。 clarify：澄清。The committee asked him to clarify his points．委员会要他澄清他的观点。 revise：修改；修订。Professor Jones twice asked Tom to revise his essay．琼斯教授两次要汤姆修改他的文章。contribute：作贡献；起作用。Exchange of ideas contributes greatly to mutual understanding．交换看法大大有助于相互了解。