1 . The traffic was __________ (busy) than usual and there were more people on the bus. (所给词的适当形式填空)
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2 . We can't remember __________ (clear) when we first met. (所给词的适当形式填空)
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3 . I will never __________ (忘记) the days when I worked together with you. (根据汉语提示单词拼写)
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4 . You have to think twice when you __________ (选择) a friend. (根据汉语提示单词拼写)
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