Mr. Smith was the last man I wanted to see I did all in my power to help him.A. BecauseB

问题补充：

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

答案：

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。