20．聽第8段材料，回答第12至14題．
12．Why does the woman come to talk with the man？
A．Because she wants to use the computer．
B．Because there's some trouble with her computer．
C．Because she had made a plan for the use of computers．
13．How do the students feel about the present plan for the use of computers？
A．The time is too changeable．
B．The time is too limited．
C．The machines are hard to use．
14．What do the speakers plan to do tomorrow？
A．Forbid students to use the computers．
B．Prepare a notice to solve the problem．
C．Allow students to use the computers for longer hours．
