We are waiting until the weather ________ a little.
Recently a new social issue has been brought to everyone’s attention ___ __food additives are abused.
While the police have already done a lot of investigation, much evidence ___ __.
_____ on everyday practice, progress in English is a goal which can be achieved.
Look out! Keep away from the house, _____ the roof is under repair.
.You’d better get the problem solved as soon as possible ______ it becomes out of control.