My friend warned me ______ going to the East Coast because it was crowded with tourists.
It was some time _______ we realized the truth.
Roses need special care _______ they can live through winter.
This photo of mine was taken _______ stood the famous Eastern Bright Pearl in Shanghai.
You should made it a rule to leave things _______ you can find them again.
In time of serious accidents, _______ we know some basic things about first aid,we can save lives.