There has been a () lack of communication between the union and the management.
A. regretful
B. regrettable
C. regretting
D. regretted
参考答案:B
解析:
C和D是分词形式,不符合句子结构要求;regretful的主语多为人;regrettable指“(某事物)令人遗感的,可惜的”,如:Your choice of friends is regrettable.你对朋友的选择实在不怎么样。故本题选B。