Fill in the blanks with the appropriate active and passive verb forms (present simple, present continuous, past simple, past continuous, past perfect). Julius (buy) an engagement ring to surprise his girlfriend, but it (steal) from him when he (leave) the establishment. He (go after) the thief, who - he found out later - (tell) to rob him. It was his girlfriend all along: she (discover) about his plans and (decide) to make a bigger surprise before him!