问题补充：
Having exercise every day will do great good to your health.
A. a great many
B. a plenty of
C. a great deal of
D. a great number of
答案：
A. a great many
B. a plenty of
(答案→)C. a great deal of
D. a great number of
解析：短语辨析。A．很多，修饰可数名词 B．大量的；修饰可数名词 C．大量，修饰不可数名词 D．多数的。句意：每天参加大量锻炼对你的健康大有好处，exercise为不可数名词，故选C。
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