题目内容：

_ you know learning English is very important,you should try your best to learn it well.
A.Now that
B.While
C.Though
D.As soon as

优质解答

排除法
B当.事后；虽然的意思,也不符合逻辑
C是虽然的意思,明显不符合逻辑.
D一.就,也不符合逻辑
A既然的意思,既然你知道学习英语非常的重要,所以你应该尽你所能学好英语.