One third of the class _____ agreed to be volunteers to help the aged this vocation.
The reason why I burst into tears is _________ I don’t want to part with my mother.
——Would you mind if I keep the door open? ——____________.
In the north people sometimes tie straw ropes (草绳) round the trees in winter to ______ them from the cold.
It’s time that you __________ the whole book.
When will you ___________ the entrance examinations, next June or next July ?