题目内容：

1.Where＿＿?Your hands are so dirty.Don't touch anything in the room.
A.have you gone B.did you go
C.have you been D.are you going
2.could you tell me＿＿?
A.when the palaces change into the Palace Museum
B.when were the palaces changed into the Palace Museum
C.when did the palaces change into the Palace Museum
D.when the palaces were change into the Palace Museum
另外说下原因..
D的答案错了..change应该有个d