单选题 9.  Little ______ at that time that this "boring" subject would become his favourite later on.
【正确答案】 D
【答案解析】 考查部分倒装。句意：在那时他不知道这个“无聊”的科目之后将会变成他最喜欢的。Little置于句首，要部分倒装。且根据句子时态和句意可知，用过去式，故选D。