It was announced that only when the examination papers were handed in ________to go out of the classroom.
It is global warming, not other things, ______ the extreme weather.
Three students ______ Wenzhou Middle School took part in the Oral English Competition.
With food, water and electricity ______, the villagers are suffering a lot.
The plan to be carried out next month needs ______ among the members of the labor union before ______.
— How are the things in your village? — Modern farming methods have been brought in and the villagers are ______ now than before.