Be careful of children when ____the road A cross B you cross

Be careful of children when ____the road A cross B you cross When you cross the road,be careful of ______. ___ careful when you cross the road. A. Do B. Do be C. Is D. be careful of the children ____ (cross)the road. You should be careful when you cross the m____ road . Be careful when you walk cross the road改错 Paul,______（be） careful when you cross the road. be careful when you go --------(cross) the road Please be careful when you go____the road.(cross) when you cross the road,be careful of the traffic 为什么是the? Be careful when you_____the road.A.cross B.crossing C.crosse be carefully 和 be careful怎么用?When you cross the road,you mus