担保

To work together with others to achieve a common goal; to coordinate or cooperate in a synchronized way.

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

The process of making important decisions, especially in a professional, political, or strategic context.

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 reply or respond to a message, letter, or inquiry. Essential for business correspondence and IELTS letter writing.

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.