Natural gas and hydro power contributed of producing 20 units of electricity while remaining 10 units was/were produced from oil.
Are both correct there please?
Chekhov Natural gas and hydro power contributed of producing 20 units of electricity while the remaining 10 units was/ were produced from oil.
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ChekhovNatural gas and hydro power contributedof producing20 units of electricity while the remaining 10 unitswas/were produced from oil.