This is the small house less than 15 square meters, under _________ roof lives a large family of three generations.
I know Jack spends at least as much time reading as he________.
It is________ for us to deal with.
There are ________ books in our school library;however,________ of them are old.
Our government are taking firm measures to make pollution________.
________ deep down in the earth,the dead forests rotted away and became coal.