Before the conference, a new problem came up __________ could speak on behalf of our group. 

As a child，Jack studied in a village school，________ is named after his grandfather.(2010·新课标全国Ⅰ，24)

Catherine's mother doesn’t allow her to go anywhere outside the town ________ another member of the family is along.

— You should have prepared your speech for the meeting, Mr. Smith. — Yes, I know. But how could I _____ the meeting date fixed so soon?

 Roses need special care ______they can live through winter.