1 . Don’t forget to show up at 5 pm, ________ we gather to go back to school together at the entrance to the Cherry Blossom Garden. (用适当的词填空)

2 . 每年五月的第二个周日为母亲节，那天孩子们向母亲表示感恩和爱。(celebrate)(汉译英)

3 . Do you believe a sneeze in the morning can kill you in the afternoon? This happened in 1918, ________ a deadly form of influenza swept across the world. (用适当的词填空)