___, people spend about 2 hours a day on social media., On concusion, On average, In time, At the bottom, He called her ___ apologize for his mistake., on average, in an attempt to, at the bottom, on time, The scientists decided to ___ to test their theory., invent an experiment, carry out an experiment, discover an experiment, narrow down an experiment, ___, I don’t really like this idea., On average, At the bottom, As a matter of fact, On time, The keys were found ___ of my bag., on the bottom, in time, at the bottom, on average, There was a strange sticker ___ of the box., at the bottom, on the bottom, in an attempt to, on time, She always arrives ___ and never keeps anyone waiting., in time, on time, at the bottom, as a matter of fact, We got to the station just ___ to catch the train., on time, at the bottom, in time, on average, The police managed to ___ the list of suspects.The police managed to ___ the list of suspects., discover, Binvent, narrow down, carry out, Scientists hope to ___ a cure for the disease soon.Scientists hope to ___ a cure for the disease soon., invent, narrow down, discover, carry out, Alexander Graham Bell ___ the telephone.Alexander Graham Bell ___ the telephone., discovered, invented, found, brought up.

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