To be successful, you need to remember that you might be very busy, you need to be energetic and enthusiastic.
A. as though
B. in case
C. even if
D. now that
网友回答
A. as though
B. in case
(答案→)C. even if
D. now that
解析：A. as though好像，B. in case以防，万一，C. even if即使，D. now that既然，句意：为了成功，你需要记住即使你忙，你也要精力充沛和有热情。所以选C。