一个优秀的社区工作者不仅在居委会中具有专业的实务能力，还需要具备一定的（）能力。
参考答案：沟通
The guard at the entrance didn’t ______ me in though I had begged him many times. [ ]
A. agree
B. permit
C. allow
D. make
短期无风险利率越高，看涨期权的价格就越低。 ( )
