The teenagers are crazy ____（介词)（疯狂迷恋某人)the young pop singer, Justin Bibber（贾斯汀·比伯).
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We should do our best to prepare ____ （介词)（为 ...... 做准备) the final exam.
The teacher informed his students ____ （介词)（通知某人某事) the coming final exam.
He （) （not want) （请调整为合适的形式)to teach you.
Should he study hard, he （) （may go) （请调整为合适的形式)to college.
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