他们彼此认识已经很久了.They____ ____ ____ each other____ a long time.快

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• 他们彼此认识已经很久了.They____ ____ ____ each other____ a long time.快
• 他们彼此认识已经很久了.They____ ____ ____ each other____ a long time.快
• the two friends______each other for a long time before they met in London in 2006A.had no seen B.have not seen（这里的before是“才”的意思吧?）A.HAD NOT SEEN
• By now most freshmen have grown so used to university life that they have forgotten all those___ abA、concernsB、worryC、dreamsD、ambitionBy now most freshmen have grown so used to university life that they have forgotten all those___ about the university they originally had.A、concernsB、worryC、dreamsD、ambition