6 sentences with «knows»

« Although no one knows for sure how many birds perished that summer in the Coto Doñana refuge, it is estimated that there were no fewer than 20,000. »
« Now, who knows if I'll get out of this. »
« -Ask the boy if he knows what city he's in. »
« In principle, you should have someone who already knows the exercises explain to you how to do them. »
« Pollution knows no borders. Only governments. »
« As almost everyone knows, the bat's phonatory apparatus can emit at frequencies much higher than those perceptible to the human ear - i.e. in the ultrasound band - and it is the bounces or echoes of these emissions that signal obstacles to the bug. »

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