Unit 5 Into the wild 课文语法填空-2022-2023学年高中英语外研版（2019）必修第一册

Unit 5 Into the wild Passage 1 The Monarch’ s Journey Many animals move from one place ________ another at certain times of the year. This movement________(call) migration. They migrate ________(find) food, find a partner or search of warmer weather. Of all the mass ________(migrate), that of the North American monarch butterflies is one of the ________(wonderful). Every autumn, millions of these beautiful insects with delicate black and orange wings begin a long and difficult journey. Somehow they manage ________(trave)l around 4, 000 kilometers south and find their way to places where they will spend the winter. ________, until recently no one knew how they do this. A team of scientists ________(lead) by Professor Eli Schlizerman at the University of Washington has now found the answer. They have discovered that the monarch is able to tell the time of day. It then uses its eyes to measure the position of the sun. These two pieces of information —the time of day and the poin