The thief ________ in from the kitchen window as the door was closed.
A．may climbB．must have climbed
C．could have climbedD．should have climbed
D
問(wèn)句中使用了過(guò)去時(shí)態(tài)，說(shuō)明動(dòng)作發(fā)生在“過(guò)去”；A、C項(xiàng)表示“現(xiàn)在”或者“將來(lái)”，排除。must不能和完成時(shí)一起用于疑問(wèn)句，排除。這里should have done表示應(yīng)該做某事而沒(méi)有做，帶有批評(píng)的口氣。
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