Chuyên đề 10: Động từ khuyết thiếu
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isn't necessary to submit my assignment today. A. I must submit my assignment today. B. I needn't submit my assignment today. C. I could submit my assignment today. D. I shouldn’t submit my

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isn't necessary to submit my assignment today. 

I must submit my assignment today.

I needn't submit my assignment today.

I could submit my assignment today.

I shouldn’t submit my assignment today.

Giải thích

Chọn B