– Whose ping pong bat is this?

-- I’m not sure. I think it ______be Tom’s.

A．might

B．must

C．will

D．can’t

起源于Kulchitchky 细胞的肺癌是（）

A．鳞状细胞癌

B．腺癌

C．小细胞癌

D．巨细胞癌

E．细支气管肺泡癌