—It was a red light, William. You ____ the car.
—Sorry.  I didn’t see it.
A．must stop
B．should stop
C．must have stopped
D．should have stopped
D
考察虛擬語氣。句意：威廉，紅燈亮了。你應該停車�！獙Σ黄�，我沒看見�！癿ust+have+done”表示對過去事情的肯定推測，譯成“一定做過某事”； “should+have+done”意思是“本來應該做某事，而實際沒做。故選D。
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