禁令标志的作用是什么？
A．禁止或限制行为
B．告知方向信息
C．指示车辆行进
D．警告前方危险
参考答案：A
He was robbed last night, but _____ he didn't have much on him then. [ ]
A. fortunately
B. eventually
C. certainly
D. surprisingly
艾里克森认为幼儿期的主要发展任务包括（）。
A.获得主动感
B.克服内疚感
C.获得完善感
D.避免厌恶感
