fill in the blanks with the appropritate from of the words in parentheses
bell demonstrated his ............... at a lot of exhibitions (invent)
he was asked to ................ how to connect with the internet ( demonstration )
he is busy doing ........................work at the moment(experiment)
there was a big ................. after world war 2(emigrate)
Bell demonstrated his invention at a lot of exhibitions.
He was asked to demonstrate how to connect with the internet.
He is busy doing experimental work at the moment.
There was a big emigration after world war 2.
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