e governments and scientists not worked together , AIDS-related deaths _______ since their highest in 2005.

It is comforting to see that ________， we are doing our part for the environment.

What are you going to do this afternoon? — I will probably play computer games ________ my parents are out.

I paid a fine of 200yuan for speeding. If only I_________ the traffic rules!

It is going to rain today.Take an umbrella with you to _____ you from the rain.