I a topic for the composition but haven’t decided yet.A. will think aboutB. have been t

问题补充：

I a topic for the composition, but haven’t decided yet.

A. will think about

B. have been thinking about

C. had thought about

D. was thought about

答案：

A. will think about

(答案→)B. have been thinking about

C. had thought about

D. was thought about

解析：考查时态：句意：我一直在考虑作文的话题，但是还没有决定呢。从but haven’t decided yet.可知是从过去到现在一直在想，还没有决定，表示动作从过去到现在一直在进行，可能还是要进行下去，用现在完成进行时，选B。