______ the students in our class is 50 and _______ them study very hard.
The air company going from bad to worse, the workers __________ hardly enough to make a living.
In some places women are expected to earn money __________ men work at home and raise their children.
They kept trying __________ they must have known it was hopeless.
The bad weather meant __________ the rocket launch(发射)for 48 hours.
Although the country has had political independence for over a century,__________ it needs the support of its neighbors. naturally B. economically C. especially D. Luckily