_____ from other continents for millions of years, Australia has many plants and animals not found in any other country in the world.
33. We were about to climb up to the top of the mountain ________ it began to rain heavily.
32. —How do you find my idea? —_______.
31. Don’t you think that______________ is no use promising without doing?
30. Is this the girl______ whom I can turn for help? Is she good at this subject?
28._______ our food running out, we had to walk to a village for help.