Jack is late again. It is _______ of him to keep others waiting.

I’m not sure whether he has the key that ______ the door of the classroom.

下列各句中没有语病的一句是( )

MrWang _____ table tennis well, though he suffers from a waist pain and _____ it for a long time

My sister has a habit of keeping a diary and writes down ______ happens every day．