3道初中英语选择题（答案已给出,请解释选该答案的原因）
1、Do you know about our town?
No, this is my first time I ()here.
A.come B.have been (答案为B,为什么）
2、It was not long ()I forgot it all.
A.then B.when C.after D.before(答案为D,为什么）
另外,请解释long before,before long 的区别及应该用在什么时态）
3、He came up to ask()
A.waht my name was and what was the matter B.what my name was and what the matter was（答案选A,为什么）