垄断

To examine and verify the accuracy, legitimacy, or quality of documents, applications, or accounts. It is a standard procedure in administrative and academic processes.

To express dissatisfaction about a service or product to an official body or the provider. This is a high-frequency topic in the IELTS General writing section (letters of complaint).

To receive and provide food, drink, or entertainment for guests or visitors.

Offering a lower price, better terms, or special treatment than usual, often as a discount or promotion.

A service for sending letters and packages quickly; express delivery.

To give back money to a customer who is not satisfied with a product or service, or the amount of money returned.

A written or spoken agreement, especially one concerning employment, sales, or tenancy, that is intended to be enforceable by law.

Activities used to advertise a product or service to increase sales, often involving price reductions.

A formal, legally binding agreement between two or more parties. Essential for topics involving work, renting, or purchasing services.

To promise or ensure that something will happen or be done. It is used to provide assurance of quality, safety, or commitment.