－English is too hard for me to study well. I don’t want to learn it any more.－Don’t        . It is useful in the future.

--What should I do next?--       the bananas and yogurt into the blender.

Your radio is too noisy . Could you _______ , please ?

    Many teenagers_______ the old and they often offer their seats to the old on buses.

Today the forests are getting fewer and fewer. We must _______ down too many trees.