男性，50岁。咳嗽、咳白色泡沫痰5个月，胸痛半月。胸片示右肺下叶内带近肺门处有一直径3cm分叶状阴影，密度不均匀，周围呈片状阴影。

肺功能检查示FEVl％为83％，MVV为72％。头颅CT示3．2cm孤立性脑转移病灶。其治疗方式选择（）

A.先切除肺部病灶再切除脑部病灶

B.先切除脑部病灶再切除肺部病灶

C.只切除肺部病灶

D.只切除脑部病灶

E.无手术指征

The director wants to make sure no one will solve the mystery until it ________ at the end of the horror film.

A．is explained

B．will be explained

C．explains　

D．has explained