Creating better health care, education and housing for everyone is a simple idea, but ____ which is hard to put into practice.
--- Who did you spend last weekend with? --- ______.
Miss Smith is a friend of ______.
From the top of ______ Empire State Building, you could see up to ______ distance of 130 kilometers on a clear day.
He is always full of ______ as though he never knew tiredness.
Apples are usually sold by ______weight, and eggs are sometimes sold by ______ dozen.