problems have cropped upの例文

例文

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1. Two problems have cropped up this month that offer some insights.
2. Similar problems have cropped up in other cities across the nation.
3. Mechanical problems have cropped up and the ruthless Schumacher has closed with back-to-back wins.
4. But some problems have cropped up in the agricultural projects.
5. "No problems have cropped up, " he said.