S: I’m sorry. Professor Johnson is not here at the moment. This is his assistant, Sally.  _____52_____?

Dogs have a very________sense of smell.

• A、nice
  

• B、clear
  

• C、good

• D、high

P: No, not very serious, but the doctor told me to stay in bed and have a good rest.
S: I see. I’ll  _____55_____ as soon as he came back.
P: Thank you. Goodbye!
S: Bye!