病历摘要：女，56岁。因胸部不适，2月来诊，无发热，无咯血。起病以来体重明显减轻。查体：左胸呼吸音减弱，左上胸扣诊浊音。胸部X线片示“左上肺占位病变”。做胸部CT线检查。

1.诊断是什么？

"You __ have a wrong number," she said. "There's no one of that name here. "

A．need

B．can

C．must

D．would