— I am shocked at the news that many pupils were killed in the terrible traffic accident.

— So am I. Little           the safety of the poor children. [ ]

A. did the local government care for

B. the local government cared for

C. did the local government care about

D. the local government cared about

义齿翘动或摆动的原因是（）

A.支托移位形成支点

B.基托边缘过长或过锐

C.基托过厚过大

D.卡环尖进入基牙倒凹区过深

E.咬合过高，基牙负担过重