1 . 他现在能骑自行车了, 但几星期前他不会。 (用情态动词完成句子)
He can ride a bike now, but________________ .
He can ride a bike now, but
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2 . 我想了又想, 但我记不起我在哪里买的词典。(用情态动词完成句子)
I have searched my memory, but I________________ where I have bought the dictionary.
I have searched my memory, but I
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