单句语法填空
【小题1】Self-driving is an area __________ China and the rest of the world are on the same starting line．
【小题2】Who is the woman __________ you talked with just now？
【小题3】She and her family bicycle to work, __________ helps them keep fit．
【小题4】The number of smokers, __________ is reported, has dropped by 17 percent in just one year.
【小题5】In 1963 the UN set up the World Food Programme, one of __________ purposes is to relieve worldwide starvation．