—Have you thought of the topic for the composition? — Not yet．I it very carefully but I

问题补充：

—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

答案：

A. will consider

(答案→)B. have been considering

C. had considered

D. was considering

解析：考查动词时态。由Not yet.以及 but I haven’t decided.可知，是一直在考虑，所以用现在完成进行时，表示一直在做这件事。