No bread eaten by man is so sweet as _____ earned by his own labor.
It is ______ that we can’t finish it on time.
He found that his house had been ______ and some important files were lost.
---Did you tell Julia about the result? ---Oh, no, I forgot . I _____ her now.
He was walking along the sands ______ he saw a big footprint in the sand.
In public places, we can often see ______ that tell us useful things, such as no parking, no smoking, etc.