He was known to have been hanging about and was not expected to pass the test. his fail

问题补充：

He was known to have been hanging about and was not expected to pass the test. , his failure came as no wonder to his parents.

A. However

B. Instead

C. Besides

D. Therefore

答案：

A. However

B. Instead

C. Besides

(答案→)D. Therefore

解析：考察副词词义辨析。A然而；B代替，而不是；C而且；D因此；句意：人们都知道他一直都在闲逛，没有希望能够通过考试。因此，他的失败对他的父母来说是不奇怪的事情。根据句意说明上下文是因果关系，故使用therefore。故D正确。