The language used in advertisements differs from used in ordinary readings.
We all know that, __________, the situation will get worse.
---How's your tour around the North Lake? Is it beautiful? ---Itbe, but it is now heavily polluted.
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?