A football suddenly flew over our head and it ______ missed hitting a child playing nearby.

(2013 ·湖北武汉武昌高三联考)Smiling doesn't ________ mean you're happy.Sometimes, it just means that you're strong enough to face problems.

The death toll of the quake in New Zealand is _____ 150, but officials say the figure won’t stand because they are still getting information in．

The charity sale our school organizes every year has taught us much. _______ we would never have learned it in class.

The national parks are very important for the protection of these wild animals, which would ______ run the risk of becoming extinct.