根据句意,填入句子所缺的单词（第一个字母已给出）
1.I (大写i)l_____fall in Canada.2.Today is Chen Jie's birthday.John is sending h____a card.3.It's May.What s_____is it in Beijing?4.Autumn is beautiful.I can watch the leaves f_____.(第一句的第一个字母是大写i,第二个字母是小写L)