1 . During the pandemic period of COVID-19, numerous volunteers______(递送) daily necessities to the doors of people in need every day. (根据汉语提示单词拼写)

2 . I am delighted to have been invited to your school to________ (发表) a speech. (根据汉语提示单词拼写)

3 . They stayed in the open air, waiting for the helicopter to _______(运送) supplies. (根据汉语提示单词拼写)