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There have been many great inventions, things that have changed the way we livE. The first great i...

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suffered    have been suffering    were suffered    had been suffered  
experiences    advantage    dream    changes  
No,they haven't  Yes,they have  No,they have  Yes,they haven't  
had been taken place; have been set up    have taken place; have been set up    have been taken place; have been set up    were taken place; were set up  
A.great deal of   A. large number of    Large quantities   A.good many  
How many times    How many time    How long    How often  
to have finished    to finish    to be finishing    to have been finished  
Large quantities of; have been   A.great many; has been  A.large quantity of; were    Quite a lot; is  
are to challenge    may be challenged    have been challenged    are challenged  
has been  have been   was  were  
had; has    has been; have    have; has    has; have  
suffered  have been suffering   were suffered  had been suffered  
wouldn’t be, for which    wouldn’t have been, with which    hadn’t been, as which    wouldn’t have, to which  
are to challenge   have challenged   are challenging   have been challenged  
have been taken place    had been taken place    have taken place    are taking place  
suffered   have been suffering   were suffered   had been suffered  
A.were  being  to be  to have been  
Large quantities of   A.great deal of   A.great many     A.large amount of  

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