对放射线不敏感的肿瘤是（）
A.未分化癌
B.恶性淋巴瘤
C.鳞状细胞瘤
D.恶性淋巴上皮瘤
E.骨肉瘤
参考答案：E
When Mr Wang came in, we stopped ______. [ ]
A. to talk
B. talking
C. talk
D. talked
