Brian talks to me like a child，_____really annoys me．

This year’s fall in profits was not unexpected　　　,it is very disappointing.

With some technical problems to be solved, it may be a while _______ the system is put into use.

The road back home may be difficult before the Spring Festival, ______ the desire to get together with family members can never be stopped.

_)I had not believed in falling in love with somebody at first sight_______I met David on Valentine’s Day three years ago.