Many boys enjoy _______ football, basketball or baseball

－ What does the sign over there read － “No person ________ smoke or carry a lighted cigarette, cigar or pipe in this area”

Which do you think is ________, health or wealth？

利用键盘在对话框中的不同项目组间移动光标用______键。()

键盘上的换档键是________()

29．__________ when you are on the bus or bike．

可以在BROWSE浏览窗口中，按CTRL+T键实现______操作。

Which do you think is _________________important, health or wealth?

键盘上的Ctrl键叫控制键， 它____使用。

在计算机键盘上的Tab键称为______。

Duty is an act or a course of action that people __________you to take by social customs, law or religion.

在Windows系统中，使用键盘上_____键可以进行重命名操作。