单选题 Between 1981 and 1987, the number of permanent jobs had increased by only 1,000 , although training has been substantially______by the corporation.(2013年3月中国科学院考博试题)
【正确答案】 A
【答案解析】解析：A项“boost”意为“促进，提高”；B项“curtail”意为“剪短，截短”；C项“plunge”意为“把……投入，使突然陷入”；D项“expend”意为“花费，花销”，由句意可知，公司的培训项目得到了显著的提高，因此选择A项。