-- l wonder --- pet fish .-- they are a pleasure to watcha\ why people keepb\ why do people keepc\ where people keepd\ where do people keep请说明理由好吗?

-- l wonder --- pet fish .-- they are a pleasure to watcha\ why people keepb\ why do people keepc\ where people keepd\ where do people keep请说明理由好吗?
-- l wonder --- pet fish .-- they are a pleasure to watch
a\ why people keep
b\ why do people keep
c\ where people keep
d\ where do people keep
请说明理由好吗?

-- l wonder --- pet fish .-- they are a pleasure to watcha\ why people keepb\ why do people keepc\ where people keepd\ where do people keep请说明理由好吗?
A
引语,正常语序.
--- 真搞不懂为毛有人养鱼……
--- 赏心悦目啦.

后面回答没有提到地点，而是原因。前面肯定是why， wonder后从句接陈述语气，所以A。