once/ twice/ … every day/ month/ year/ … 每隔幾天/月/年…做某事…次. Olivia goes to her grandma's house once every tow month. Olivia每兩個月去一次她外婆家 ... ... <看更多>
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once/ twice/ … every day/ month/ year/ … 每隔幾天/月/年…做某事…次. Olivia goes to her grandma's house once every tow month. Olivia每兩個月去一次她外婆家 ... ... <看更多>