they will study at home __A___ computer.(他们将会在家通过电脑学习)
A.on B.in C.on the
on computer 通过电脑...
例句:My sister will study at school on computer.
我的妹妹将会在学校通过电脑学习.
on the computer在电脑上面
例句:My book is on the computer.
我的书本在电脑上面.
in computer(没什么意思)
例句:I have experience in computer operation.
我有电脑操作经验.