A 16-year-old male student had been infected with bird flu in Hunan province the fourth

问题补充：

A 16-year-old male student had been infected with bird flu in Hunan province , the fourth case of human bird flu found in China.

A. committed

B. confirmed

C. convinced

D. considered

答案：

A. committed

(答案→)B. confirmed

C. convinced

D. considered

解析：词义辨析。Commit犯罪，做错事；confirm确认，证实；convince说服，使确信； considere考虑。句意：湖南省一位十六岁的男生被确认感染了禽流感，这是在中国的第四例人类禽流感。故选Ｂ。