Relier Pairs Talking About FunctionsVersion en ligne Matching par Logos Sprachinstitut 1 The vehicle is powered by the engine. 2 The purpose of the backup file is to keep our data safe. 3 The shelf is bolted to the wall with screws. 4 The function of the switch is to turn the machine on and off. 5 The airflow is regulated by the valve. 6 The purpose of the wheel is to steer the truck. 7 The bridge is supported by steel pylons. Screws bolt the shelf to the wall. Steel pylons support the bridge. The wheel steers the truck. The valve regulates the airflow. The engine powers the vehicle. The switch turns the machine on and off. The backup file keeps our data safe.
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