Bộ ôn tập Từ cùng trường nghĩa môn Tiếng anh có đáp án (Part 9)
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Folic acid is especially important for women of childbearing age, as folic acid deficiency/lack has been linked with birth defects.

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Circle the word which best fits the sentence.

Folic acid is especially important for women of childbearing age, as folic acid deficiency/lack has been linked with birth defects.

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Giải thích

deficiency