Professor Li always allows his students to voice their opinions in class, ______ sometimes their opinions are not sound.
--- What is that wonderful smell? --- Our neighbor ________ for a party.
_______ you have got such a good chance, you’d better make full use of it.
The next morning she found the man ___ in bed, dead.
As we have known from the map of the world, this is ______.
He is not easy-going, but his trust in his friends will last forever once _______.