Will you help me to look for an important paper I left in my office this morning as soon as you _______？

A．arrived

B．arrive

C．will arrive

D．would arrive

上颌窦癌向后侵犯，可使（）

A.窦外侧骨壁破坏，壁外脂肪密度消失

B.窦部皮下脂肪与肌间隙消失

C.颞下窝结构不清

D.翼突破坏，翼腭窝增宽

E.齿槽骨破坏