Questions 23 and 24 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions. Now listen to the news.
How many casualties did the attack cause

A．19%.
B．90%.
C．10%.
D．30%.

A．He needs to press F7 to return to the document before he prints it.
B．He has to print the document to see the page numbers.
C．The printer is not working correctly.
D．The numbers are on the screen but they don’t print out.