Choose the word or phrase that is CLOSEST in meaning to the underlined part in each of the following sentences.

Câu hỏi

Water and fresh air are very necessary for every living thing.

A. essential

B. difficult

C. expensive

D. wasteful

Đáp án
A. essential

Câu hỏi thuộc Bài tập:

Tiếng Anh 9-Unit 5