PE will be part of the high school graduation examinations．______,you will have to be strong and healthy to graduate．
A.After allB.As a matter of factC.In other wordsD.What’s more在线课程C
解析：
考查交际用语。after all毕竟；
as a matter of fact实际上；
in other words换句话说；
what’s more而且。空后一句是对前句话的解释，所以选C。