单项选择题
The chief of surgery became committee chairman by virtue of（）.(2014-72)
A．seniorityB．serviceC．ageD．rank
单项选择题 There were 150_____at the international conference this summer.(2010-68)
单项选择题 The employers prepares, with all due______, for a conference with the Trade Unions. (2014-79)
单项选择题 They’ve lifted a two-year-long economic______on the country.(2011-76)
