(2009·江苏，23)Because of the financial crisis，days are gone ________ local 5－star hotels charged 6,000 yuan for one night.

________ she couldn't understand was ________ fewer and fewer students showed interest in her lessons.

It is helpful to put children in a situation _____ they can see themselves differently.

It will be five years ____ we meet again. 

. My father likes outdoor activities,_______ my mother prefers staying at home.