Open the brackets using the right form of the verb in the Passive Voice: B.The Loch Ness...

Question

Open the brackets using the right form of the verb in the Passive Voice:
B.The Loch Ness Monster
The story of the Loch Ness monster begins in 1933 when it (to see) for the first time. Since then it (to see) at least once every year and (to photograph) many times. The first photograph (to take) by a local man in November, 1933. On one occasion, large brown eyes (to see) and horns** (to report) several times. Ears (not to mention) yet.
The monster, however (not to forget), and probably never (to forget). It is known that it sometimes leaves the loch and a few years ago it (to see) ninning along the main road not far from a cafe. Occasionally two monsters (to see) at the same lime. It (not to know) whether they are father and son, husband and wife, or perhaps monster and girlfriend. But the monster and its activities (to consider) still a mystery.

Answer 1

The story of the Loch Ness monster begins in 1933 when it (was seen) for the first time. Since then it (has been seen) at least once every year and (photographed) many times. The first photograph (was taken) by a local man in November, 1933. On one occasion, large brown eyes (were seen) and horns (were reported) several times. Ears (have not been mentioned) yet.
The monster, however (is not forgotten), and probably will never (be forgotten). It is known that it sometimes leaves the loch and a few years ago it (was seen) rinning along the main road not far from a cafe. Occasionally two monsters (are seen) at the same lime. It (is not known) whether they are father and son, husband and wife, or perhaps monster and girlfriend. But the monster and its activities (are considered) still a mystery.