Question

【题目】A: Hey, man. You can’t cross the street now. You have to wait _____ the traffic lights turn green.

B: Oh, sorry and thank you.

A. when B. after C. until D. while

Answer 1

【答案】C

【解析】

句意“嘿，先生。你现在不能横穿街道。你必须等到交通灯变绿。”“噢，对不起，谢谢你。”本题考查until意为“直到……”在肯定句中的用法。故选C。