When spring comes, the days get ____ and the nights get _____. 

--- What is your favourite sport? --- Swimming, I think. It’s _____ of all.

If you want to be healthier,you should eat ______ meat and______ vegetables .

Allan is________ more outgoing than I.

—You see, “Food Safety” receives thousands of Internet hits a day. —Yes, it becomes one of the _________ topics(话题) these days.