At crossroads,we always see the traffic lights.When the red light is on,we should ________ .When the
题目
At crossroads,we always see the traffic lights.When the red light is on,we should ________ .When the green light is on,we can _____________.
答案
At crossroads, we always see the traffic lights. When the red light is on, we should _stop_ . When the green light is on, we can _go_.
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