It was because of hard trainingthe sportsman won the gold medal in the competitionA. howB

问题补充：

It was because of hard trainingthe sportsman won the gold medal in the competition．

A. how

B. that

C. why

D. which

答案：

A. how

(答案→)B. that

C. why

D. which

解析：考查强调句。强调句结构为it is /was + 强调部分 + that从句，本题强调介词短语because of hard training，故选B。句意：是因为艰苦的训练，运动员在比赛中获得金牌。