Having ________ every night is very important for your healthA.a good amount of sleepsB.a number of sleepC.a good amount of sleepD.a great deal of sleeps
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C解析本题的含义是每天晚上有大量的睡眠对你的健康是非常重要的，sleep为不可数名词，故不选AD，a number of修饰可数名词，a good amount of表示大量的意思，修饰不可数名词，故本题选C。