My uncle’s house in the downtown area is much smaller than ours , but it is twice _______ expensive .
He spoke for a long time but his meaning did not ___________.
–My uncle suggests I _______ abroad. --I would rather you ________ at home.
He sets us so difficult a problem_________ I couldn’t work out.
We think that it’s love, generosity and perseverance _______make the world ________ it is today.
It seems that living green is _______ easy and affordable. A small step makes a big difference.