问题
选择题
She stepped on my foot _______, not _______, which made me angry.
A．by chance; on purpose
B．on purpose; by chance
C．for purpose; by chance
D．by chance; for purpose
答案
B
考查短语辨析，by chance偶然地，on purpose故意地，句意：她故意踩了我的脚，不是偶然地，使我很生气。所以选B。