For a successful business,friendly and ______ staff are essential.A.sufficient V B.effective C.

题目

For a successful business,friendly and ______ staff are essential.A.sufficient V B.effective C.
A sufficient
B.effective
C.efficient V
D.responsible

答案

一个成功的事业,友好和（）的员工是至关重要的.答:A.足够的 B .有效 C.
貌似B