A(n)______is the smallest unit of speech that can be used to make one word different from another.

单项选择题Question 6 is based on the following news. At the end of the news item, you will be given 10 seconds to answer the question. Now listen to the news.

单项选择题______is the last day before Lent, a period during which Christians are supposed to give up pleasures and eat very moderately.