Never mind. You've just caught ________ a cold.A.a bitB.a bit ofC.a littleD.a little of
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B解析a bit和a little常可换用，但在修饰名词时有区别：a little可直接修饰不可数名词，而a bit则需与of搭配。如：a little money / a bit of money；a little cold / a bit of a cold（有点感冒）。如果a little与of搭配，则a little用于预指后文，即of后的名词为特指。如：I've only read a little of the book.（这书我只读过一点。）