根据对话内容，从对话后的选项中选出填入空白处的最佳选项，并在答题卡上将该选项涂黑，选项中有两项多余选项。

----Mum，my old bike had gone wrong again。What shall I do？

----1

----great ！but can I have a mountain bike 。

----why a mountain bike？there's no mountains around here。

----mountain bikes are stronger ，and they're better at going up hills。But I...

----2

----money 。do you know how much they cost？at least $ 300 each！how can I get so much money?

----3

----over a year！but I need one now。

----4

----I suppose about $ 150 each。

----well ，that sounds more reasonable。If you save $ 5 a week ，you'll have enough in about six months。

----5

----well go ahead with your saving and I'll make up the rest in six months 。now ，go and get your old bike repaired。

A．	no problem。
B．	buy a new one
C．	is that expensive？
D．	what's troubling you？
E．	Mm...but I still hope...
F．	how much does an ordinary bike cost ？
G．	you can save up the money ，say $ 5 a week ，then in just over a year、、、、