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问题: 选择2

Since you are very tired ,you ____finish the work today.

A don’t need Bneedn’ to Cnot needDneedn’t

解答:

needn't
need既可以做情态动词,又可以做行为动词。当做情态动词的时候,否定直接在后面加not,且加动词原形。但当行为动词是,有人称时态的变化。