Unit 8When is your birthday,Section A (3a3c,一、用所给单词的适当形式填空。 1March is the _ (three) month of a year. 2How old _ (be) your parents? 3December is the _(twelve) month of a year. 4Today is my _ (nine) birthday. Im nine. 5My birthday is on July the _ (twentyfive,third,are,twelfth,ninth,twentyfifth,二、单项选择。 6My sister has _ pens. The _ is red. Afour, fourthBfourth, four Cfour, four Dfourth, fourth 7Lets meet _ eight _ the morning. Aat, at Bat