问题
单项选择题
Mobility is one of the characteristics often （） executives, and they must accustom themselves to moving quite regularly.
A. demanded of
B. asked for
C. expected from
D. called for
答案
参考答案：A
解析：
demand of“向……要求”，demand sth. of sb. (或from sb.)“要求某人做某事”；ask for“向……要……”；ask me for the book“向我要书”；expect of“指望，期望”，不接from; call for“要求；需要”，如：This invitation does not call for an answer. 这请帖不需要答复。对于executive来说，mobility是一种要求，不是指望，这与后半句中的must呼应，所以应用demanded of。