__________ the students are doing theirmaths exercises with the help of the teacher.

I can’tsing ________ dance. Would you please teach me _________first

Yunnan province in China was attacked by such a terrible drought this early spring ____________few people had experienced before, ____________ made us worry about global climate changes

he day we enter _____University, we know _____ fierce competition for jobs is awaiting us upongraduation.

I hear we will have a sport meet for the next two days______, we won’t have lessons for two days.[ ]