根据句意及首字母提示填写单词，使句子意思完整。

1. Mr. Wang is very r________. He has quite a lot of money.

2. Kangkang is feeling truly sad. He f________ the English exam.

3. It's my dream to l_______ on the moon one day.

4. Shanghai is in the e______ of China. It's a beautiful city. 

5.  I'm a s__________ here. Can you tell me the way to the railway station?

关于商业信用与银行信用，不正确的是（）。

A.银行信用在一定程度上克服了商业信用的局限性

B.商业信用先于银行信用产生

C.银行信用是商业信用的基础

D.商业票据在一定情况下可以成为银行信用的工具