I thought you might be tired, （） is why I decided to help you.

Have run out of fuel, the plane crashed to the ground.

The only way to conquer a fear is to face it, and doing so as frequently as possible.

It took years for Einstein"s theory to gain acceptably.

What effect has the Internet had on music piracy

The Crimea hope to make money （）.

Cars turn into dead weapons when they are driven carelessly.

The guide dogs helping the people with dementia will （）.

After reading the novel he was too exciting to go to sleep that night.