Plans have been proposed ______ the largest dam in the world to be built along the Congo river.
Rather than ______ at home playing cards on the Internet, I prefer _______ out for a day trip.
Two-thirds of the land ________ covered with green grass and the rest _______ covered with pine trees.
I feel it is you as well as your wife that for your son’s bad performance at school.
Tom is so talkative. I’m sure you’ll soon get tired him.
— How do you keep fit?—By having a healthy diet and _________ regularly.