You __________ careful .When you ______ the road

You __________ careful .When you ______ the road Paul,______（be） careful when you cross the road. Be careful when you ______ _______ the road. When you cross the road,be careful of ______. Be careful when you are crossing the road,or you ______ get You should be careful when you cross the m____ road . Be careful when you walk cross the road改错 be careful when you go --------(cross) the road Please be careful when you go a( ) the road Be careful ------you ----the road You must be careful when you cross the road.(改为祈使句） be carefully 和 be careful怎么用?When you cross the road,you mus