Being determined is a kind of quality and that’s ________ it takes to do anything properly.
The number of people invited ______ fifty, but a number of them ____ absent for different reasons.
You, who ______ his good friend, should help him get out of trouble.
More than one student _________ read the novels, which _________ written by David.
The boy, rather than his friends, _________ for the accident.
A poet and artist ____ coming to speak to us about Chinese literature and painting tomorrow afternoon.