1- You have got two hands, each of ............ has five fingers.
( that - it - which - them )
2- The Nile used to flood. This was useful..........the land was covered with fertile mud.
( in which - which - in that - by which )
3- I think that by 2030, the issue of global warming........................
( will tackle - may have been tackled - is tackled - will have tackled )
4- Half the world's population....................English by 2050.
( will speak - is spoken - will have spoken - will have been spoken )
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