--- Have you thought of the topic for the composition?
---Not yet, I _______ it very carefully, but I haven’t decided.
A. will consider B. have been considering
C. had considered D. was considering
--- Have you thought of the topic for the composition?
---Not yet, I _______ it very carefully, but I haven’t decided.
A. will consider B. have been considering
C. had considered D. was considering
B
I haven’t decided yet说明一直在考虑，还没决定，故选B。