Who____ it be that is knocking at the door? — It ____ be Father, but I’m not sure. [ ]

15It is often said that the joy of travelling is________in arriving at your destination___inthe journey itself

There is still much room for improvement in our work, I see it.

Lindawasunhappywhenyouwenttoseeher,_______

He is an honest person ， so what he said is _______.