He used this discovery to ________ a machine for making electricity. Faraday also showed how electricity affects chemical ubstances.

Nowadays, plastics _______ many other materials, and it is easily shaped.[ ]

He is a politician and has a _____ sense ofthe current affairs all over the country

The news came as no surprise to me, for I _______of it earlier

The drivers have to ________ the traffic rulers if they want to be safe on the road.