Question 7 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Question 8 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Except jewelry, diamonds can be used as ______.

单项选择题Diamonds are so hard that only _____ can cut it.