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