There is little chance that we will succeed in changing the law. it is important that we

问题补充：

There is little chance that we will succeed in changing the law. , it is important that we should have a try.

A. Therefore

B. Otherwise

C. However

D. Thus

答案：

A. Therefore

B. Otherwise

(答案→)C. However

D. Thus

解析：副词辨析。A因此；B否则，要不然；C然而；D结果是；句意：我们几乎没有可能改变法律，然而我们试一下是很重要的。根据句意说明上下文存在着转折的关系，故C正确。要特别注意however在使用的时候，前后欧需要使用逗号隔开。