Ответ: 1. have just reported, 2. have been sent, 3. have already been released, 5. haven't discovered, 6. are hoping
Have just reported - Present Perfect, так как действие только что произошло.
Have been sent - Present Perfect Passive, так как действие совершено над людьми.
Have already been released - Present Perfect Passive, так как действие совершено над людьми.
Haven't discovered - Present Perfect, так как действие еще не произошло к настоящему моменту.
Are hoping - Present Continuous, так как действие происходит в данный момент.
Ответ: 1. have just reported, 2. have been sent, 3. have already been released, 5. haven't discovered, 6. are hoping