---It’s the office! So you _____ know eating is not allowed here. ---Oh, sorry.
He was really disappointed to find that he had failed to make himself ______, although he tried his best to describe vividly.
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.