请帮忙答题：when you ___ street you must look first 填什么选择的答案有：1,a cross 2,go cross 3,cross 4,goes a cross
问题描述：
请帮忙答题：when you ___ street you must look first 填什么
选择的答案有：1,a cross 2,go cross 3,cross 4,goes a cross
答