The two young men introduced a virus into the computer system. (alleged) →The two young men _{……………………………………………………………}a virus into the computer system.

The two young men introduced a virus into the computer system. (alleged)

→The two young men _{……………………………………………………………}a virus into the computer system.

The two young men introduced a virus into the computer system. (alleged) →The two young men ……………………………………………………………a virus into the computer system.