_天津成考网

Which of the following is true?

• A、How the light shines on our work is of much importance.
  

• B、The way the light shines on your work makes no difference.
  

• C、We needn’t care about where the light comes from.

• D、People Call write or study under a light that opines from any direction.

Teachers recommend parents____their children under 12 to ride bicycles to school for safety．

• A、not allow
  
• B、do not allow
  
• C、mustn’t allow
  
• D、couldn’t allow

51.__________,