读“某区域经纬网图”，回答有关问题．

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按要求写出下列化学符号。
（1）氢元素____；
（2）水中氧元素化合价为-2价____ ；
（3）2个硫酸根离子____；
（4）氢氧化钠____ ；
（5）氯化亚铁____。

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

A:Excuse me. ____

B:The bookshop? It's near the flower store, but it's a little far from here.

A:____

B:Let me see. It's about six kilometres away. You can go there by bus.

A:____

B:Yes, the No. 16 bus will take you there.

A:____

B:Go down this road and don't stop until you get to the first street. ____

A:Thank you very much.

B:You're welcome.

A.How far is it from here?

B.Where is the bus stop?

C.Is there a cinema near here?

D.You can see it on your left.

E.Where is the bookshop?

F.Can you tell me which bus I should take?