Kate was not sure_______.
--- Tom, what do you think is the secret ____ writing in English? ---- ____ reading lots of English activities, you can improve it a lot.
Paul __________ go into the room. He __________ a key.
---What is in that building?---__________ a meeting room and some offices.
---__________ do you usually play basketball with your friends? ---After school.
---How about wacthing a football game? ---__________.