The speed of cars and trucks is ________ 30 kilometers per hour in large cities in China.

Would you mind if the window was closed—________ I also feel a little cold

Computer is so useful. It can do almost everything.—Yes, but it ______ what to do.

That car accident _________all his life. After that he was limited to a wheelchair.

―Who is ringing the doorbell. ―Maybe _ is your aunt.