【题目】According to the traffic rule, when riding a motorbike, you must wear a to protect your head.
A. helmet B. shirt C. cap D. mask
【答案】A
【解析】句意:根据交通规则,当骑摩托车的时候,你必须带头盔来保护你的头。helmet头盔;shirt衬衫;cap帽子;mask面罩。根据句意when riding a motorbike和to protect your head可知,骑摩托车应该戴头盔,故选A。