I a topic for the position, but haven’t decided yet.
A. will think about
B. have been thinking about
C. had thought about
D. was thought about
网友回答
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。