Summit 1 - Unit 9 - Review

Rewrite the following sentence in the passive voice:

The military must have moved the aliens' bodies to a secret place.

Rewrite the following sentence in the passive voice:

Witnesses might have seen evidence of the event

Rewrite the following sentence in the passive voice:

Stanton Friedman must have written the first account of the Roswell conspiracy.

Rewrite the following sentence in the passive voice:

They couldn't have moved the stones without lots of help.

Rewrite the following sentence in the passive voice:

Richard Heene had to have asked Falcon to lie to the authorities.

Rewrite the following sentence in the passive voice:

The islanders might not have used the stone figures for religious purposes.

The Incas didn’t have any sophisticated machines or work animals. The temples ________________ have been built exclusively by human hands.

• must

• couldn't

• may

Dinosaurs may not have died off gradually as the result of climate change. They ___________________ have been killed off quickly by some sudden event.

• had to

• could

• would

 I don’t believe in any of those other crazy theories. Stonehenge _____________________ built by ancient Britons many years ago.

• might have been

• were

• had to have been

The Nazca lines are incredible, but I’m certain they weren’t created by people who lived 1,500 years ago. The ancient people ________________ had the knowledge to create something so accurate.

• couldn’t have

• would have

• must have