Answer:
You can make the passive in a subordinate clause that has a subject and a normal conjugated verb. This is really the same as a normal passive. Active: I thought that Mary had kissed John. Passive: I thought that John had been kissed by Mary.
Explanation:
The first sentence. There should be a comma after surprised.
The Trojan War was won by the Greeks after a 10-year long battle. The decisive turn in the war was the charge led by Odysseus from the Trojan Horse.
