37. What can be inferred about taking painkillers from Paragraph 2?

• A、It leads to addiction in a short period of time.

• B、It builds up the tolerance to pain.

• C、 It becomes less effective over time. 

• D、 It cures stomach and liver diseases slowly.

58

18. _____the result of the exam, she stood at the door of the classroom，disappointed.

• A、Knowing
  
  

• B、To be known

• C、Known

• D、To know