1. have + V-en用以正確表達時間順序

根據描述回答問題

1. a. Dan was leaving the room when I walked in.
   b. Sam had left the room when I walked in.
   Q: Who did I run into?                                      
   Ans:   A. Dan             B. Sam
2. a. When the rain stopped, Gloria was riding her bicycle to work.
   b. When the rain stopped, Tom rode his bicycle to work.
   Q: Who got wet on the way to work?               
   Ans:   A. Gloria         B. Tom
3. a. Ken went to the store because he was running out of food.
   b. Ann went to the store because she had run out of food.
   Q: Who is better at planning ahead?                 
   Ans: A. Ken                 B. Ann
4. a. Lin taught at this school for nine years.
   b. Smith has been teaching at this school for nine years.
   Q: Who is teaching at this school now?            
   Ans: A. Lin                  B. Smith
5. a. Alice was walking to the door when the doorbell rang.
   b. George walked to the door when the doorbell rang.
   Q: Who had been expecting the doorbell to ring?                              
   Ans:   A. Alice           B. George
6. a. When I got there, Marie had eaten.
   b. When I got there, Joe ate.
   Q: Who was still hungry when I got there?      
   Ans:   A. Marie          B. Joe
7. a. I looked across the street. Mr. Fox was waving at me.
   b. I looked across the street. Ms. Cook waved at me.
   Q: Who began to wave at me before I looked across the street?              
   Ans:   A. Mr. Fox      B. Ms. Cook
8. a. Sara had never had any boyfriend until Tom appeared.
   b. Martha has never had any boyfriend since Tom disappeared.
   Q: Who is probably in love with Tom at the moment?               
   Ans:   A. Sara            B. Martha