Question

---Where is my pen?--- I _____it. A．might lose B．wouldn’t have lost C．should have lost D

---Where is my pen?--- I _____it. A．might lose B．wouldn’t have lost C．should have lost D．must have lost

Answer 1

D

本题考查情态动词。从原题中Where is my pen?这一信息句可告诉考生，“笔丢了”，丢的动作是过去发生的。因此用must + have done表示对过去事实的肯定猜测。