The prize of the game show is ＄30,000 and an all expenses_______ vacation to China．

Chinese students are good at taking exams and you can’t imagine what they are willing to to succeed.

It may not be a good idea. But before ____is put forward, we’ll make do with it.

Have you been to the Great Wall?- Perhaps not in my memory. ________, it might have been during my early childhood.[ ]

Nobody believed his reason for being absent from the class __________he had to meet his uncle at the airport.