.They will start their project ____at helping the poor children to be educated in China's west.
During the ten-day vacation, they traveled to France their own expense
Towards ___________ morning, _________ heavy snow began to fall.
Moreover, __________you may hardly believe, the examiners had decided in advance to fail half the students taking part in the exams.
Sandy could do nothing but _________ to his teacher that he was wrong.
--The prison was ___________ fire last night.--Someone must have set fire___________ it.