1.$10,000 was a considerable ________(数量) of money at that time.
2.Suddenly the door ________ (旋转) open and he came in.
3.The thief was caught because of the ________ (偷窃).
4.They ________ (聊天) about the film shown last night.
5.It is difficult to predict his reaction because he is so ________ (喜怒无常的).
