重度沙眼活动性病变占上睑结膜之面积：
A．＜1/3B．＜2/3C．＜3/4D．＞2/3E．1/3～2/3
参考答案：D
They ________ with each other for two years before they got married.[ ]
A．had fallen in love
B．got in love
C．had been in love
D．fell in love
