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1. Tom is so independent that he never asks his parent's opinion __ he wants their support.
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2. The professor warned the students that on no account __ use mobile phones in his class.
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3. Their child is at the stage __ she can say individual words but not full sentences.
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4. Most colleges now offer first-year students a course specially __ to help them succeed academically and personally.
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5. Kate heard a man's voice in the background, but she could't __ what he was saying.
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6. Amy, as well as her brothers, __ a warm welcome when returning to the village last week.
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7. We can observe that artificial intelligence has already made a(n) __ on our lives in many ways.
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8. — My son got a full scholarship to his dream university! — Wow, __ ! What's he going to study?
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9. __ all the problems, several of the players produced excellent performances.
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10. __ to think critically is an important skill today's children will need for the future.