Plans have been proposed ______ the largest dam in the world to be built along the Congo river.
Don’t you think that______________ is no use promising without doing?
The children were warned of not being too _______ about things you are not supposed to know.
Americans eat____ vegetables per person today as they did in 1990.
Students ______ remain in their seats until all the exam papers have been collected.
The atmosphere of the earth ______ us from the strong sun light.