补写出下列名句名篇中的空缺部分。

（1）是故弟子不必不如师，师不必贤于弟子，　　　　　　　，　　　　　　　，如是而已。

（韩 愈《师说》）

（2）                           ，一夫当关，万夫莫开。        （李白《蜀道难》）

（3）四十三年，                  ，                       。

（辛弃疾《永遇乐•京口北固亭怀古》）

（4）荡胸生曾云，                       。                       （杜甫《望岳》） 

（5）予独爱莲之出淤泥而不染，                    　　　。    （周敦颐《爱莲说》）

（6）士不可以不弘毅，                   　　。                        （《论语》）

The development of e-commerce may well bring the world into a brand new era of "electronic currency". At the moment, (52) areas in Europe, the United States and Asia have already started studying the possibility of an electronic currency. Electronic currency is not only about currency. It (53) to an entire finance system on the Net. It includes a virtual numeric currency, an electronic system of withdrawals, transfers and loans, and (54) cards of all shapes and sizes. The (55) of an electronic currency system implies the emergence of "virtual banks" and "virtual enterprises". Actually, the first virtual bank appeared in the US in 1995. (56) it is a small and insignificant bank, it represents the trend of the future. In time to come, we may even have to (57) the familiar paper currency.

As the Net pushes the economy (58) rapidly, the economy is also bringing the Net market forward, resulting in the Internet itself becoming the world’s largest emerging market. Of course, this is just the beginning. Although there are many companies which made huge profits (59) in the Internet market, they tend to be small companies. To date, most companies are making losses. The competition in the knowledge-based economy will also be more (60) This will definitely promote (61) and more efficient cooperation.

53().

A.bridges 

B.camps 

C.refers 

D.casts