We can see light in his office. He___________ be in his office.

— Wow! You look different! You            wear glasses.— Yes, I did. But now I am wearing contact lenses(隐形眼镜).

 Sorry I’m late. I ____ have turned off the alarm clock and gone back to sleep again. 

 Linda _____ come to meet me at the station, but I’m not sure.

---Mum, I hurt my leg when I climbed the tree. --- You ___ that tall tree. I’ve told you many times.