下面短文中有10处语言错误。请在有错误的地方增加、删除或修改。

增加：在缺词处加一个漏词符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（＼）划掉。

修改：在错的词下划一个横线，并在该词下面写出修改后的词。　　

注意：1.每处错误及其修改均仅限一词；

2.只允许修改10处，多者（从十一处起）不计分。

It is real a good chance to have met all of you here. We have spent several precious weekend in learning in the English Club. Although we have been members for a short period of times, we have made a great progress. That is because we are all very much active and the activities are not only enjoyable and also helpful. Besides, the foreign teachers here work hard and try his best to make the activities lively and interested. I am very pleased to say that all of us greatly improved our spoken English so far. I am looking forward to see all of you again in the near future!

使用价值和价值的矛盾统一体是（）。

A.市场

B.商品

C.货币

D.银行券