名词单复数与动词时态辨析 — 英语词汇题

听写填空：请根据所听录音（读两遍）补全句子，注意名词单复数与动词时态的正确形式。录音原句为：Over the past decade, the ______ (company) ______ (expand) their business into several foreign ______ (market), and the managers say the results ______ (be) encouraging so far.