问题补充：
Could you tell me?
A. who can help us organize the show
B. how long you have bought the car
C. what was your favorite subject
D. how many students are there in your class
答案：
(答案→)A. who can help us organize the show
B. how long you have bought the car
C. what was your favorite subject
D. how many students are there in your class
解析：考查间接引语与时态。B 选项中bought不能与how long连用， C选项中语序没有改变。D 选项中语序没有发生改变。
