Preposition Challenge

We need to concentrate our efforts _______ finding the solution to this problem

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careful when you apply the paint ________ the surface. It dries very quickly.

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i wasn't sure how my parents might react ________ the news.

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when mike said he was getting married, I needed a moment to recover ________ the shock.

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Mike applied ________ a scholarship and got it. He's going to study in Canada for six months.

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I'm going out for a walk. I can't concentrate ________ my homework right now.

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Are you sure it's ok for us to spend the night? We don't wish to impose ________ you.

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I miss having steady income, but it's wonderful to work ________ myself, and not someone else.

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I know I've chosen to be a lab scientist, but I cannot inflict pain ________ other living creatures

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I've always struggled ________ math at school. Ironically, I became an accountant.

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