--- You can have a pet dog, but suppose you get bored with it in a few days? ______--- We won't, we promise! (2011 .安徽)
Write your name and address on your bag ________ you lose it.
After finishing middle school, my sister did nothing ________ at home.
They held a ceremony ________ those killed in the battle.
The play begins at 6: 40 pm. So we have to be at the theatre ________ 6:30 pm at the latest.
I asked him whether he had done all the work himself ________ whether he had had any assistance.