Not until all the fish died in the river _____ how serious the problem of water pollution was. [ ]

must have been a large number oftourists in Sanya during the past Spring Festival, __________

p star was asked many personal issues, surrounded by crowds of fans, so that his patience _______.

Could you tell me where _______ the post office— ________ I didn’t hear it clearly.

It’s really a small world！I________we would meet here