初二英语题,帮我看看！！！
情景对话
A:____1___?
B:We are playing football.____2___?
A:Sorry,I'm busy now,I can't join you.By the way,you can't play on the road.___3____!
B:Why not?
A:Because there are many cars and buses on the road.They will hit you.___4___!
B:Oh,thanks.
A.How are you B.Can't you see C.What's matter with you D.Come and join us E.What are you doing there
F.You must be careful G.No problem
这是今天早上期末考试的题，我们几个人对答案，都不一样，所以问问大家．我的答案是：EDBF 但是他们都是EDFB！
要求有解释，特别是第3、4空，答得好的加悬赏
谢谢！
参考答案:EDBF！
A:___1.E.What are you doing there__?
A:你们在干什么？
B:We are playing football.____2.D.Come and join us ___?
B：我们在踢足球。过来一起玩吧？
A:Sorry,I'm busy now,I can't join you.By the way,you can't play on the road.___3.B.Can't you see ____!
A：对不起，我很忙，不能和你们一起玩。顺便说一下，你们不能在马路上玩，明白吗？
B:Why not?
B：为什么不可以？
A:Because there are many cars and buses on the road.They will hit you.___4.F.You must be careful ___!
A：因为马路上有很多车。会撞到你们的。当心点！
B:Oh,thanks.
B：哦，谢谢。