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96. The National Transportation Safety Board has recommended the use of fail-safe mechanisms on airliner cargo door latches assuring the doors are properly closed before takeoff and to prevent them from popping open in flight.
(A) assuring the doors are properly closed
(B) for the assurance of proper closing
(C) assuring proper closure
(D) to assure closing the doors properly
(E) to assure that the doors are properly closed 答案是E没有问题~
og对D的解释是D offers the necessary infinitive, but thegerund phrase closing ... imprecisely refers to the act of closing the doors rather than to the condition of the
closed doors.
我想问一下d除去说表示动作而不是状态这一问题，本身用assure doing是否正确
还有就是我记得assure的用法好像是assure sb of sth ,assure sb that
这里的E选项是assure省略了sb 还是说本身也可以这么用，然后这一题是不是用ensure更好一些
麻烦各位大牛们能帮忙解释一下assure的用法，谢谢！
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发表于 2013-8-27 22:45:18
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