题目内容

Obama didn’t explain ______ any larger principles have guided him through the historic convulsions of the 2011 Arab Spring.
A．whatB．thatC．whereD．whether
D

这题考查whether引导宾语从句的用法：句意是：奥巴马没有解释是否有任何较大的原则指导他通过历史惊厥的2011个春天。选D。
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