I don’t know _____ next.

ys, many people walk to work ________Copenhagen Conference calling for living a low-carbon lifestyle to deal withglobal warming.

The worsening ofglobal warming, _____human activities are to blame, has led to frequentlyextreme weather.

You mustn’t swim here. Look at the sign. It____“No swimming”.— Oh, I_______ notice it. Thanks for telling me.

My brother used to _______ up late, but now he is used to _______ up early.