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三、用所给单词完成句子 1.It was an informal party so I didn’t need to wear (need,wear)a suit. 这是一个非正式的晚会,因此我不必穿正装。 2.You needn’t have taken (need,take)a taxi there,for it’s very near. 你本没有必要乘出租车到那里的,因为距离很近。 3.He didn’t need to buy (need,buy)a ticket at all,for he was only a 5-year boy then. 他没有必要买票,因为他当时只是个五岁的孩子。 4.—He was worried about his son those days. ——那些日子他一直在为儿子担心。 —He needn’t have been (need,be)so anxious. ——他本没有必要那样焦虑的。