Schooling is compulsory for all Vietnamese children from the age of 6 to 14.

Câu hỏi :

Schooling is compulsory for all Vietnamese children from the age of 6 to 14.

A obeyed 

B required 

C obligatory   

D optional

* Đáp án

D

* Hướng dẫn giải

Phương pháp giải:

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