问题

Thedrivermanagednottohitthechildwhoraninfrontofhiscar,butonly________injuringhimself[ ]
A:inhopesof
B:asaconsequenceof
C:atthemercyof
D:atthecostof
B:asaconsequenceof
C:atthemercyof
D:atthecostof
正确答案是: