双基限时练(一) unit 1 part ⅰ 基 础 夯 实 ⅰ.用适当的介词填空 1.i'm delighted to know you have such faith ________ me. 答案 in 2.tom got angry at his brother and aimed a book ________ his head. 答案 at 3.this sort of sweet food is very typical ________ the food in the south of the country.