Give the correct from of the verbs in brackets

give the correct from of the verbs in brackets
1.Some people think married women shouldn't (pursue) ............ a carreer
2.If we can see the environmental impacts,we (know) ............... how to protect the environmen from many threats
3.Noise pollution (cause) .............. by loud and annoying sounds of motor vehicles,railway and factories
4.He said that he (do) ............ homework then
complete the sentences with the correct ffrom the word in bracket
1.Some (science) ................ think that children whose parents allow them to used eletronic devices early will have more advantages in the future
2.Fresh,clean water is very (improtance) ................ to life
3.Tourists are fully aware of environmental (protect) .............
4.We need to think how to use electroni dictionaries (effect) ............