Junk messaging has been a headache for years, ＿＿the action taken by the authori-ties has not yet produced the results expected

The government has taken some measures to solve the problem of unemployment, but it may be some time ______ the situation becomes better.

He doesn’t think the question of ________they are boys or girls is important.

________it is hoped that college students should be equipped with the ability to take a good set of notes, this is not always the case．

_________ we could afford it, we wouldn’t go abroad for our holidays.

The strange man asked me to hand the letter to _____ I met in the police station, saying it was very important.

_____ the police thought he was the most likely one, they could not arrest him since they had no exact proof about it. 

To sum up, ______ war is unavoidable, human beings cannot enjoy everlasting peace.

Jim, I am sure __________ we met, we were at a rock concert, and since then we’ve known each other.