Look out! Keep away from the house, _____ the roof is under repair.
---When will your new book come out? ---It _____ be out in a month at most.
I’m afraid that the thread will break _____ it’s the weakest.
---We are late because we took _______ wrong road. ---You should be careful ______ next time.
It’s important to give her an emergency phone number ______ the children get hurt or sick.
China won 32 gold medals in the 2004 Olympic Games, _____ second among all the competing countries.