—Would you permit me ___________ here?— Sorry. We don’t permit ___________ in the lab.
I won’t call you, ________ something unexpected happens.
---The last one __________________ pays the meal. ---Agreed!
A---It's a long time since I saw my sister. ---her this weekend?
The manager suggested an earlier date ____________ the meeting.
Some pre-school children go to a day care center, __________ they learn simple games and songs.