问题
选择题
Research suggests that fast food and soft drink directly _________ to childhood obesity.
A．appear
B．contribute
C．adjust
D．respond
答案
答案：B
题目分析：考查动词辨析。句意：研究表明，快餐和软饮料直接导致儿童肥胖。appear出现，似乎；contribute to有助于，导致；adjust to调整，使适应；respond to回应。故选B。