As soon as he______ his error, Rockfeller made the necessary corrections to his data collecteD

A had been cleaning B is cleaning

C has been cleaning D was cleaning

A moves B moved

C has moved D has been moving

A she'd never forgive me B she never forgive me

B she'll never forgive me D she does never forgive me

A they had got to the bus stop B had they got to the bus stop

C did they get to the bus stop D they got to the bus stop

A does B is doing

C will be doing D will do

A came B did come

C was to come D come

A had gone B have gone

C be going D go

A hasn't heard B hasn't been hearing

C hadn't heard D didn't bear

A gave B to give

C giving D would give

A he had gone B had he gone

C his going D he went