-- I want to put up the picture on the wall. Would you mind helping me with it? -- ______. With pleasure.
What can we students do _____ the environment?
—How long have you lived in this town? —_____ 2001.
There are five people in the room, but I know _____.
Don’t give up _____ you will never succeed.
Trees can stop the sand _____ towards the rich farmland in the south.