I'm so sorry I woke you up. I __ called you if I knew you were sleeping.

She ___been a lawyer but she decided to study accountancy instead.

Oh no! My phone isn't in my bag. I __ left it on the train.

If I had known about your accident, I ____phoned you.

He __ committed the crime, as he had both the motive and the opportunity.

If you wanted to stay in that hotel you ____ booked before!

A(n) ____ is a deliberately fabricated falsehood made to deceive people.

A(n) ____ is a proposed explanation for a phenomenon that is backed by evidence.

Researchers might have been discovered a new species of mammal in the Amazon rainforest.

The use of nuclear weapons should have prohibited by international law many years ago.

Many conspirary theorists have suggested that the moon landing was faked, but this has been disproven.

A team of archaeologists have uncovered what they are believed to be an ancient civilization.

The possibility of time travel should still consider to be a theoretical concept.

The idea that the earth is flat must have thoroughly debunked by scientific research in the past.

Many people have claimed to seen a Loch Ness monster, but no concrete evidence has been found.

The theory of evolution has widely accepted by the scientific community.

Scientists believe that they may have been discovered a cure for cancer.