Much research has been done on interviews in gene

Much research has been done on interviews in genceral， so the training of journalistic in

Much _____ said about the problem but nothing _____ been done so far .A.were，hasB.is，has

A research center has been set up in this

A research center has been set up in this

A research center has been set up in this

He has done much to increase the ______ of English teaching in this country. ( )