指导语
参考答案：
心理实验由被试完成，主试为交待任务向被试讲的话叫指导语。
________so delicious, the food in this market was sold out soon.[ ]
A. Tasting
B. Tasted
C. Having been tasted
D. Being tasted
p=xy，p为质数，问x+y不可能为下列哪一项
A．3
B．4
C．6
D．10
E．(E) 12
