Plans have been proposed ______ the largest dam in the world to be built along the Congo river.
With a lot of difficult problems ______, the newly-elected president is having a hard time.
—I must apologize for ______ ahead of time. —That’s all right.
------ I missed the bus. What a pity !------______. There will be another one in five minutes.
What the remote areas need______ education to children and what the children need______ good textbooks at the moment .
______ of danger in the street last night, she had to go home, with a friend following her.