Global economic competition keeps sellers on their ______.

Choose the correct answer:

He's got a headache. He claims _________________ on the computer all morning.

Choose the correct answer:

He hopes ________ a promotion.

Fill in the gap using the active vocabulary of the units.

The act or process of not allowing something is called .

Complete the following sentence with correct grammar form:

If I (find) a wallet in the street, I would return it to its owner.

International institutions trace their origins _____ the end of World War II.

Historians suggest that the advent of mass tourism began in Germany during the industrial revolution.

Human migration is a temporary change of residence by an individual or group.

The term _________ means a territorial subdivision of a country.