In spite of the tight schedule of study, the activities for students to achieve their potential have never been _______.
A. called in B. called off C. called out D. called up
In spite of the tight schedule of study, the activities for students to achieve their potential have never been _______.
A. called in B. called off C. called out D. called up
B
【解析】句意：尽管学习安排很紧，但开发学生潜能的活动从未被取消过。call in召来；call off取消；call out大声呼叫；call up给……打电话。根据句意可知，B项正确。