患者，女，44岁，右侧下颌第一磨牙、左侧下颌侧切牙、尖牙、第二磨牙缺失，余牙正常。可摘局部义齿修复，当基牙左侧下颌第一磨牙为Ⅲ类导线，宜利用哪类卡环（）。

A.单臂卡环

B.间隙卡环

C.下返卡环

D.上返卡环

E.对半卡环

Only ticket-holders were _______ to the stadium for the concert given by Jay Chou, so many of his fans were turned away.

A．allowe

B．permitted

C．agreed

D．admitted