"Some students do homework three or four times a week"中为什么要有

"Some students do homework three or four times a week"中为什么要有 my studen do homework three or four times a week no studen d 问:my studen do homework three or four times a week no studen most+students+exercise+three+or+four+times+a+week. 翻译：three or four times a week most students exercise three or four times a week 的同义句 Most students exercise three or four times a week翻译成中文是什么意思 we exercise three or four times a week对three or four times a He exercises three or four times a week对three or four times _______students watch TV three or four times a week. about three or four times a week语句正确吗 no students do homework once or twice a week中student为什么加s