When it comes to gossip(流言蜚语), learn to keep your mouth shut ________ you’ll avoid trouble

It’s generous ________ them to give food and clothes to homeless people. They think it important________ them to provide places for homeless people to stay.

Much of the power of the trade unions has been lost ____, their political influence should be very great[ ]

We can use QQ to talk with each other on the Internet.— Really Will you please show me _________

Would you mind moving the desk — .I will do it right away.