单选题
It is amazing that a small child of 3 or 4 years of age can sing a song without understanding its meaning______.
A、
really well
B、
fully
C、
entirely well
D、
very much
【正确答案】
B
【答案解析】
[解题指要] 该题测试表程度的副词。really，entirely，well，fully同为表程度的副词，用一个即可，因此排除A和C。修饰understand不能用very much，但可用very well，只有B符合题意。
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