--Did you see Kate yesterday?

--Yes. She ________ a letter when I saw her.

1. A.
   has written
2. B.
   had written
3. C.
   was writing
4. D.
   wrote

–Did you see Kate yesterday?

--Yes. She________ a letter when I saw her.

A. has written    B. had written    C. was writing    D. wrote

?Did you see Kate yesterday?

?Yes. She ________ a letter when I saw her.

A. has written

B. had written

C. was writing

D. wrote