RoyandCarla的精選

問題詳情：用方框中所給單詞的適當形式填空，使對話通順、正確。每詞僅用一次（每空一詞）。Marie：RoyandCarla，whatareyourideasforsolvingthesepollutionproblems？Roy：Tocutdownairpollution，weshouldtakethebusorsubwayinsteado...