He went to see his mother________.two every daytwo every daysevery two dayevery two days

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He went to see his mother________.two every daytwo every daysevery two dayevery two days
He went to see his mother________.
two every day
two every days
every two day
every two days

He went to see his mother________.two every daytwo every daysevery two dayevery two days
every two days.

every two days

every two days 表示每隔2天
every+数字+day/year/week......每隔几....

every two days
他每两天去看望一次妈妈.

应该是every two days吧~
额,应该是对的吧~采纳哦~