D【解析】试题分析：考查动词辨析：

They ________ carefully, but they didn’t ________anything.

I didn’t like the story,________, it’s too long, also it was written by a writer I don’t know

You can imagine what great tuouble we had_____ the school for the blind.[ ]

gh I majored in English, language _______ becamea challenge when I set foot in the USA for the first time.