A big dust storm covered Sydney for hours, ______ the Sydney Opera House invisible.
It is not how much we do but how much love we put into what we do __________ benefits our work most.
Was it on a lonely island __________ he was saved one month after the boat went down?
It was not until I came here __________ I realized this place was famous for not only its beauty but also its weather.
Father keeps impressing __________ me the importance of following others' advice wisely and correcting my mistakes in time.
—__________ he or his friends going to the party? —He as well as his friends __________ going.