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common normal ordinary regular
He was picked up by a car. A camel took him to the road. A passer-by Bedouin helped him. His uncle and cousin found and rescued him.
average ordinary common normal
average ordinary regular normal
until，that not until，that not until，when when，then
did he took off; I recognized he took off; I recognized he took off; did I recognize did he take off; did I recognize
when; that until; when when; then until; that
average ordinary regular normal
normal ordinary average regular
until，that not until，that not until，when when，then
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