问题补充：
---Can you hear me? ---No, I can’t. Would you please speak ?
A. clearly enough
B. quick enough
C. enough clear
D. enough clearly
答案：
(答案→)A. clearly enough
B. quick enough
C. enough clear
D. enough clearly
解析：clear 清澈的 做副词 清晰明了 完全地 一直地
clearly 明确地,清楚地 显然地,无疑地
当两者均可表示“清晰地”、“不模糊地”，有时可换用，但是若其前有修饰语，则只能用clearly。
Enough修饰形容词副词时要放在这些词的后面，所以选A.
