According to the author，what is the difficult thing to people in school?

• A、Listening．
  

• B、Reading． 
  

• C、Writing．
  

• D、Speaking．

She was so _____in her job that she didn't hear anybody knocking at the door.

• A、attracted 
  

• B、absorbed  
  

• C、drawn
  

• D、concentrated

 你是Lucy，寫一封給老同學Allen的邀請信，邀請他參加下個星期日下午4點(12月23日)的校友聚會。希望Allen盡快回信接受邀請，以便他們及時做好安排。