Choose the correct answer.

In the mid-19th century, scientists discovered that Mars had some similarities _______ Earth.

Choose the correct answer.

I promise that I (not/ come) _______ late.

Find the mistake.

Eden locked the door, puts on his coat and started walking his dog.

Choose the correct answer.

What _______ when I called?

Choose the correct answer.

I completely forgot about this. Give me a moment, I (do) _______ it now.

Choose the correct answer.

The _______ can fall below zero degrees Celsius in winter.

Choose the correct answer.

_______ believe there will be life on Venus in the future?

Choose the correct answer.

The scientists believe that there might be some planets to _______ human life.