1. When I asked him what he was doing, he smiled guiltily and then put the parcel on the desk.
    当我问他在做什么时，他讪讪地笑笑，然后把大包放在桌上。

2. When I asked him what he was doing, he smiled guiltily and then put the parcel on the desk.
    当我问他正干什么时，他内疚地笑了，然后把那个大包拿到了桌上。

3. I took one guiltily, lit it and smoked with satisfaction.
    我内疚地接过一枝点上，心满意足地抽起来。