— Has your sister finished her paper yet— I don't know. She（）it this morning.
A: writes
B: was writing
C: has written
A: writes
B: was writing
C: has written
举一反三
- ---Has he finished his paper? ---I don't know. He ____ it this morning. A: has written B: wrote C: had written D: was writing
- —Has he finished his essay—I don't know. He()it this morning. A: has written B: was writing C: wrote D: had written
- Shirley ________ a book about China last year but I don’t know whether she has finished it. A: was writing B: wrote C: is writing D: has written
- Shirley a book about China last year but I don’t know whether she has finished it. A: has written B: wrote C: had written D: was writing E: is writing F: was written
- Shirley _______ a book about China last year but I don't know whether she has finished it. A: has written B: wrote C: had written D: was writing