Having been used for a long time,the computer needs repairing.1 Having been used for a long time,the computerneeds repairing.2 To have been used for a long time,the computerneeds repairing.3 Used for a long time,the computerneeds repairing.三个哪个是对的?why

问题描述:

Having been used for a long time,the computer needs repairing.
1 Having been used for a long time,the computer
needs repairing.
2 To have been used for a long time,the computer
needs repairing.
3 Used for a long time,the computer
needs repairing.
三个哪个是对的?why