to frighten the poor man, Mrs Richards quickly hid under stairs.
A. Not anxious
B. Anxious not
C. Being not anxious
D. Not being anxious
网友回答
A. Not anxious
(答案→)B. Anxious not
C. Being not anxious
D. Not being anxious
解析：考察不定式的否定式。根据句意可知是指很担心不要吓到那些可怜的人，所以他很快躲到楼梯下面。