_福州成考网

7. By the time he retires, Carl _____ president for 15 years at the university.

• A、would be

• B、will have been

• C、will be

• D、 has been

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53. What can be inferred about people' S use of salt in the past?

• A、 People used salt to control blood pressure.
  
  

• B、People ate much salt in their average diet.
  
  

• C、People were clear about the harmful effect of salt.
  
  

• D、People didn't eat so much salt as we do today.