题目列表(包括答案和解析)
—— Hurry up. The bus is coming!
—— Oh, no, we mustn’t cross the street ______ the traffic lights are green.
A. after B. since C. when D. until
A.after | B.since | C.when | D.until |
---Hurry up. The bus is coming.
---Oh, no. We mustn't cross the street ________ the traffic lights are green.
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