【阅读判断】One problem with this design is that the mouse gets dirty

【阅读判断】One problem with this design is that the mouse gets dirty as the ball rolls over the surface and picks up dirt. Eventually you have to clean your mouse.
Q: When an ordinary computer mouse gets dirty, it has to be replaced with a new one.
A、True
B、False
C、Not Given
【正确答案】：B
【题目解析】：答案选B。题中说鼠标脏了，就得换用新的。这一说法与原文不符。原文说的是鼠标脏了，可以擦干净再用。it has to be replaced with a new one 与 you have to clean your mouse 不符。所以选B。