出车前的（）是安全驾驶的关键环节。
A、线路设计
B、车辆检查
C、身体健康
参考答案：B
The boy wanted to ride his bicycle in the street, but his mother told him ______. [ ]
A. not to
B. not to do
C. not do it
D. do not to
企业网站的系统性原则
told him ______. [ ]