Tony didn’t go to school yesterday his bad cold.A. although B. because C. because of
— I hope you don't mind my opening the window.—______ It's much too hot here.
-— Do you know_____________?— My sister’s.
_______ pleasant trip it is! I think I will never forget it .
Physics _______ an easy subject for me when I was young. I usually got high marks then.
This book doesn’t belong to _____. It is so interesting that I want to buy one for____.