分类：教育/科学-外语学习-英语考试
问题：一道冠词填空题a/an/the/不填Ifyouare____fr 
a/an/the/不填If you are ____ friend of ____ family,you may drop in for tea whout ____ invitation or telling that you are coming.
回答：If you are a friend of a family, you may drop in for tea without an invitation or telling that you are coming.

因为都不特指,所以用不定冠词就可以.