问题
选择题
Having ________ exercise every day will do great good to your health.
A．a lot
B．a number of
C．too much
D．plenty of
答案
答案：D
题目分析：a lot 副词短语,许多,大量;a number of许多大量,修饰可数名词复数;too much 太多; plenty of 形容词短语,许多的，大量的。句意:每天参加大量体育锻炼,对你的健康有好处.exercise本句中表示抽象含义,不可数,故选D.