Mary is a_____student She studies_________.

Zhou Libo is Shanghai’s favorite funny man. He is good at making people laugh. His lively shows were _________ hot that tickets sold out in minutes. 

—What do you think of the report about the air pollution on TV last night?—I think the situation is so        that we should take action to protect the environment.

------Did Lisa sing _________Alice at the corner last night, Tim? ------Oh, it’s hard to say.

  ---It’s 12 April today. Have they            found any useful information about the plane's black box?---Flight MH370? Yes, but it’s difficult to decide where the black box really is.