The charity sale our school organizes every year has taught us much. _______ we would never have learned it in class.

As the Spring Festival is drawing ______, people are getting busier and　busier.

He is quite sure that it’s____impossible for him to finish the task within two days.

Government officials cannot ________ accept bribes(受贿)，but in China quite a few take advantage of their power to break the rule .

The new group of students are better-behaved than the other group who stayed here___