问题

_____ about the man wearing sunglasses during nightthat he was determined to follow him.
A:So curiousthe detective was
B:So curiouswas the detective
C:How curiouswas the detective
D:How curiousthe detective was
B:So curiouswas the detective
C:How curiouswas the detective
D:How curiousthe detective was
正确答案是: