_____, a small advertisement held my attention, which read "Easy job. Good wages. No experience

necessary." [ ]

A. Looking through the newspaper  

B. While I was looking through the newspaper   

C. To look through the newspaper  

D. Looked through the newspaper

目前世界范围内，生物质发电主要集中在（）。

A.发展中国家

B.发达国家

C.加拿大

D.中国