It took a long time for the connection between body temperature and illness________.
Unfortunately, his father died, ______ the family even worse off.
Up to now, the weather______ pleasant for the journey. I hope our good luck will continue.
—There ______ be anybody in the classroom, for the lights are off.—I’ll go and check.
Chinese students usually spend ______ the students of the US studying in their free time.
. She has a strong belief that she will ______ her country to take part in the Olympic Games.