The managing director’s only ______ was how to improve the quali

The managing director’s only ______ was how to improve the quality of their products.
A、concern
B、confirm
C、conclude
D、confess
【正确答案】：A
【题目解析】：concern n.担心 担忧 v. 担心，confirm v. 确认 conclude v. 推断 confess v. 承认
原句：总经理唯一_______的是如何提高他们产品的质量。A 符合题意，原句：总经理唯一关心的是如何提高他们产品的质量。