Mr. Smith was the last man I wanted to see, I did all in my power to help him.
A. Because
B. Now that
C. While
D. As
网友回答
A. Because
B. Now that
(答案→)C. While
D. As
解析：句意：虽然斯密斯先生是我最不想见到的人，但是我还是尽最大能里去帮助他。这里用while“虽然”，because“因为”，now that“既然”，as“因为，正如，随着”，所以选C。