"We have 40% of the conditions implemented, about 40% are at the advanced or final stage, and this percentage is constantly growing," RIA Novosti quoted Cook as saying on the air of the Moldova radio station.
He noted that the country is in the final stages of fulfilling the conditions.
The official representative of the European Union's foreign policy service, Peter Stano, said earlier that Brussels is helping Chisinau resist the alleged "harmful interference" from Russia.
The leader of the Moldovan opposition party "Shor" Ilan Shor said in an interview with RT that Western politicians who come to Moldova promise residents "milk rivers", but in fact the people cannot even pay utility bills and are deprived of freedom of speech.