We are ______ no obligation to change goods which were not purchased here.

Câu hỏi :

Choose the best option A, B, C or D to complete each of the sentences from 21 to 39.

A. to

B. at

C. with

D. under

* Đáp án

* Hướng dẫn giải

Đáp án : D

Cấu trúc: tobe under an/ no obligation: chịu (không) chịu ơn.

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