It is a good plan in theory, but it remains _______ whether it works in practice.

I’m living in the apartment nearby. Come and see me whenever________.

(2013·高考江苏卷)With inspiration from other food cultures，American food culture can take a________ for the better.

You’d better    smoking, or you will get ill.

 I went to her home and found her living conditions were_______ than mine.