He saidthat he would write to us but so far we ___________ from him

下列特殊句式不同于其他三项的一项是：（ ）

don’t know how he managed to ______ cheating in the exam.[ ]

ed to go to dances and parties, ______ he couldhave a good time just sitting and watching

He has lost his pen. He is _______ iteverywhere.