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1.Walking is good ______ .He does morning _____ every day.

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1.Walking is good ______ .He does morning _____ every day.
A.exercise,exercise
B.exercise,exercises
2.He should ____ more exercise ______ healthy.
A.takes ,to stay
B.take ,to stay
3.Can you _____ it in English?
A.speak
B.say
B exercise为体育锻炼时,不可数,但眼操和体操例外,必须加s.
B should是情态动词,谓语动词原型 后面的to do 表目的
B speak后面一般加语言,say后面加说的内容