初一英语填空题,请分析回答要快,

问题描述:

初一英语填空题,请分析回答要快,
Now the ipad is a new kind of computer without k______.
At first,s______on the computer .At last ,don't forget to t______off it.

keyboard 键盘
start式 开始
turn ( turn off 关闭)
加油!不明白再问!