—Are you still busy? — Yes, I _____ my work, and it won’t take long.[ ]

1Her grandparents are stillin good health ______ they are over eighty.

Afer class, I play ping-pong with my classmates.

Practising Chinese kung fu can not only _____ one’s strength, but also develop one’s character. [ ]

What’s the matter with the man hanging his headthere—Well，if you ________ know, hewas caught stealing my bike.