Wait at a yellow light为什么要加at?

Wait at a yellow a yellow wait at light 怎么连 Wait at a yellow light为什么要加at? 红灯停选择题（） A.stop at a yellow light B.stop at a red light.C.wait at a red lightD.wait at a yellow light. 分别翻译:stop at a red light和wait at a yellow light与go at a green light. Wait at a yellow light和Go at a green light怎么造句(各造一句）拜托各位了 3Q 空格里面是要填的 No matter I walk or ride my bike ,I always remember the [ ]:I stop at a [ ]lightand [ ]at a [ ] lighy.I can [ ] at a [ ] light only.This weekend I'm going to [ ].在第二个lighy前面加个 yellow 吧这句的lighy改为lig When the light is ____,you must wait at the crossing.A、green B、red C、yellow Wait a moment.()light A.Green B.Red C.Yellow slow down and stop at a yellow 连词成句 1.with the play let's puppet.2.a i may look have 3.bear a have teddy i.4.i gifts have three.5.light at yellow wait a. We must wait at a yellow light.We should boey the traffic r______.A s_____ sells things.Lily's home is near the school,so she w_____ to school every day.在扩号内补充单词. The tyaffic light is yellow now .we must--------A.wait B.go C.stop Slow down and stop at the yellow lighSlow down and stop at the yellow light.Stop and wait at the red light.Go at the green light.求意思啊,求句子意思啊. what can we do at a yellow light? Can i have a look at the yellow coat? Slow down and stop at a yellow light.的意思 a yellow