题目

小朋友们，你们知道吗?车辆必须靠右行驶。下面的哪些车辆违反了交通规则?请把它们圈出来。 答案：16、A brilliant idea occurred to him,           to his research in the lab． A．while devoting                       B．while devoting himself C．while he was devoted                  D．while devoted