You must apologize ______ her ______ what you have done

That is a photo _______ my family.

these activities might cause laughter ______respect, in reality they require an enormous amount of strength.

.. —All the building materials have been washed away.—So I have heard. But there was no sign ______ a heavy rain was on the way last night.

lastic pollution ______in most public areas, it is hard______.