补全对话。

A: Mum,                    my bag? I can’t find（找到）it.

B:                                  ?

A: No, it isn’t under the table.

B: Er, is it on the sofa?

A: Oh, yes,                  . Mum, where’s my baseball?

B: I don’t know.                      in your bag?

A: I can’t find it in my bag.

B: Look!             under the chair. You must look after(保管) your things.

诊断该肿瘤性质最终的依据是

A．化验检查

B．分层穿刺

C．X线检查

D．病理切片

E．CT检渣