用括号内所给单词的适当形式填空，共5分

小题1:What a            (please) it is for me to play the piano with you!

小题2:Mother asked the Greens to help          (they) to some pears.

小题3:Tim sings even          (badly) than before.

小题4:He felt          (true) sorry for what he said.

小题5:           (clean) work is to make our city clean.

驾驶人员应按规定对机动车辆进行日常检查和（），保养质量必须经车辆管理人员验收签认。对影响行车安全的关键部件必须做到全部检查，严禁车辆带病上路行驶

A.日常保养

B.定期保养

C.认真保养

D.随时保养