回答下列句子 How many days are there in December?Is your birthday

问:How many days are there in December?/十二月份有多少天?简单的回答:31 days/31天完整的回答:There are 31 days in December/十二月份有31天问:Is your birthday in September?/你生日是在九月份吗?肯定回答:Yes,it is。/是的,在九月。否定回答:No,it isn't。/不,不是的。