I recommend       an English-Chinese dictionary, which I thought would be of great help to his studies.  [ ]

A. buying    

B. bought    

C. to buy    

D. he bought

多为中央型，多见于男性，发病年龄轻，生长快，恶性程度高，早期即可发生淋巴及血行转移，对放疗及化疗很敏感，其病理分型为（）

A．鳞癌 

B．腺癌 

C．小细胞癌 

D．大细胞癌 

E．弥漫性细支气管肺泡癌