问题
选择题
-- What is the function of the mouse?
-- It________ the cursor(光标) on the screen.
A．is used for moving
B．is used to moving
C．is using for moving
D．used to move
答案
答案：A
考查短语：被用来做某事be used for doing sth，过去常常做某事used to do,J句意：鼠标的作用是什么？它被用来在屏幕上移动光标。故选A