在美国考驾照笔试复习资料(含答案)
a 1. A diamond shaped sign means (a) warning. (b) stop. (c) yield right of way. c 2. An upside-down triangle means (a) warning. (b) stop. (c) yield right of way. b 3. An octagon shaped sign means (a) warning. (b) stop. (c) yield right of ...