单项选择题
Harry, who had failed in the final exam, had a great worry（）his mind.
A.on B.in C.with D.at
单项选择题 （）girl dressed（）black is her sister Rose.
单项选择题 Although he did not know London well, he made his way（）to the airport.
单项选择题 Two thousand dollars（）enough for the car
