We could hardly believe what she says because she is changing her mind.
A. regularly
B. steadily
C. eventually
D. constantly
网友回答
A. regularly
B. steadily
C. eventually
(答案→)D. constantly
解析：考查副词：A. regularly定期地； B. steadily稳定地； C. eventually最终地，D. constantly不断地，连续地，句意：我们几乎不能相信她说的话，因为她总是不断地改变主意。选D。