节(共5小题;每小题2分,满分10分)根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项Knowing how and when to say goodbye is often difficult, even in informal situations. Butearning to say goodbye appropriately is a skill that will help you maintain ( R)yourrelationships. It's also easier than it seems sometimes. 36Plan an appropriate time to talk before the departure. If someo