my mother is not used to the life in the noisy city and insists on__to work in the countyrside.
问题描述：
my mother is not used to the life in the noisy city and insists on__to work in the countyrside.
A sending
B sent
C being sent
D send
答
A 主动.此句话的意思是：妈妈不习惯喧闹的城市生活,所以她坚持去乡村工作.妈妈应该是主动去工作,而且insist on 后接动名词,所以选A