The big flood has caused great       to the local economies in Heilongjiang Province.

With so many problems __________, the new mayor will have a hard time in his poor town.

Judging from a large amount of evidence presented, we can safely _________ the Three Gorges Project will change the lives of a great number of humans forever.

75% of the students ______that the number of private cars _______ increasing rapidly.

Yesterday I ____my e-mail box from 163.com and found a strange e-mail.