Noise is unpleasant, _____ when you are trying to sleep. 

---- I was riding along the street and all of a sudden, a car cut in and knocked me down. ---- You can never be _______ careful in the street.

 I don't mind picking up your things from the store. _______,the walk will do me good.

Practice speaking English as often as possible and _____your spoken English will improve.

I spent several years in France, ______ I never learnt to speak French．