单项选择题
Over-taxation, many argue, impedes initiative, so that government income may actually ______.
单项选择题 it is generally thought that as teachers work with students, psychology course work is ______ to teacher-training.
单项选择题 He never exerts himself to aid those trying to ______ a difficult situation.
单项选择题 The assassin hid himself carefully from view before ______ his future victim.
