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 |
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 |
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