喉弹性圆锥又称（）
A.喉弹性膜
B.三角膜
C.方形膜
D.甲状舌骨膜
E.环甲膜
参考答案：B
She returned home from the office, only ________ the door open and something missing.
A．finding
B．to be found
C．to find
D．found
