--What's the     of the mountain?--It's 2,000 meters high. 

 I can        be a teacher. I’m not a very patient person.

 When the fire started, Tom was 　　　 to help all the children out. He is both brave and smart.

Come on, Mike! You will miss the bus ______ you hurry up.

— Is that car Mrs. Black’s? — No, _______ is a white one.