they have PE classes twice_____ three times a week but we ex

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they have PE classes twice_____ three times a week but we exercise only on weekends.
A and
B or

they have PE classes twice_____ three times a week but we exercise only on weekends.
选B
翻译
他们一周有两节或三节体育课,我们却只有在一周最后有一节
两个之间是选择关系,所以用or
两次是有固定说法twice的,三次及以上都是基数词+times表示次数再问：不是应该是 two or three times 吗
再答：两次是有固定说法twice的，三次及以上都是基数词+times表示次数

they have PE classes twice_____ three times a week but we ex We have English classes three times a week 的问句 We have PE classes twice a week. we have three English classes a week We have three Englsh classes a week.改一般疑问句 we play basketball three times a week We have five ( ) classes in a week We have # # # # classes in a week. we have（three）Englishi classes a week.就括号里提问 We have three maths classes a week.(写出此句的特殊疑问句） we have three classes ___PE every week.A.in B.for C.on 应该选择那 Tom wathes TV t______ a week but I watch TV three times a we