题目内容
13.They said that they couldn'tguarantee (to promise something with certainty) our safe arrival at the destination.分析 他们说他们不能保证我们能够安全到达目的地.
解答 答案:guarantee.
根据括号中的英语释义(to promise something with certainty)可知,此处应该是"保证,确保",所以使用动词guarantee;故答案为guarantee.
点评 做完成句子注意解题步骤:1.分析每道题目需要完成部分的语法属性 2.划出已给出部分的中心词.依据空格前后成分,确定空格的语法属性:词性、单复数、时态等.

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