_________ the exercises, we went on to learn the new words in the next unit.

Some students want to challenge themselves by helping those victims in Zhouqu______ the mud slidestook place [ ]

The fire started on the second floor and it wasn’t long ______ the whole building was burned down.

Our class is________ 60 students while theirs________ 65 students.

_____was known to us all that Johnson had broken his promise _____he would give each of us a small gift.[ ]