( ) 1. A: What are they doing? B: They're picking up leaves. | A.  |
( ) 2. A: What are the goats doing? B: They're fighting. | B.  |
( ) 3. A: Is she writing an e-mail? B: No. She's writing a letter. | C.  |
( ) 4. A: Are they doing an experiment? B: Yes, they are. | D. |