We can study in a ________.
—With _____ did you watch the 2014 World Cup Opening Ceremony ( 开幕式)?—A friend of mine.
--- 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.