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.

Choose the correct answer.

Alice _______ the accident when she was catching the bus.

Choose the correct answer.

What _______ when I called?

Choose the correct answer.

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

Choose the correct answer.

The prerequisite condition for a/an _______ planet is water supplies, appropriate temperatures and breathable air.

Choose the correct answer.

When I _______ breakfast, the phone suddenly _______.

Choose the correct answer.

The _______ can fall below zero degrees Celsius in winter.