—Your boss looks rather a kind person. —But in fact he is cold and hard on us. You ______ believe it!
____ he has been chosen to work as a teacher in the mountain village ____ him feel very proud.
The question is very important. It really needs _______.
Follow the directions on the bottle carefully when _______.
Do you think ______ important _______ us to learn a foreign language?
-----I think it _______ to smoke .----- _______.