—It's difficult to get to the other side of the river.—I think a bridge ________ over the river.
There are so many kinds of computers in the shop. I really don’t know ______ to choose.
-- How can I ______ well with my lessons, Dad? -- Practice makes perfect.
-- I hope you don’t mind my opening the window. -- ______ It’s much too hot in here.
Bob promises to join in the football match ______ he has to help his parents on the farm.
-- Did you find the small village yesterday? -- Yes, without any difficulty, for it has ______ changed over years.