— You should have helped your mom wash the dishes．

—I meant     ．But she is always telling me to study．

A．to do

B．to

C．doing so

D．doing

对社区中行动不便的退休人员应（）

A.不定期走访慰问

B.定期走访慰问

C.提供上门服务

D.偶尔走访慰问