问题详情

Police asked students to always be on their guard when walking to school.
A.警方告诫学生们，步行去学校的时候要小心戒备。
B.警方告诫学生们，去上学的途中要小心行走。
C.警方告诫学生们，走路去上学的途中一定要时刻保持警惕。