他偶尔去镇上购买补给品。

He went into town ___every ___so ___often to buy supplies.

伊丽莎白和其他人偶尔会去看她，直到有一天她离开了他们。

Elizabeth and others visited her ___every ___so ___often until one day she left them.

我偶尔喜欢犒劳自己一顿丰盛的晚餐。

I like to treat myself to a fancy dinner ___every ___so ___often.