In our class, when the bell rang and the teacher closed his book, it was a ______ for everyone to stand up.
—Was it still there _______ you were away to answer the phone?—There is no doubt about it.
--- Hi, Tom.Does John have any hobbies?--- _______, swimming will appeal to him most strongly.
---What do you think _____ an important part in their daily lives?---Music.
He seems to be doing nothing, but _____ he is just waiting for his chance.
The boss requested that he _____ there to work.