30. _______ from other continents for millions of years, Australia has many plants and animals not found in any other country in the world.
| A．Being separated | B．Having separated |
| C．Having been separated | D．To be separated |
Jack is one of those men who I am sure always do ____best even in the most difficult
situations.
| A．his | B．your | C．their | D．one’s |
---- Is your school life ___of other teens?---- In many ways, yes.
| A．this | B．the same | C．one | D．that |
Joan had often heard ____said that Marley had no money.
| A．one | B．once | C．it | D．her |
----- The boys are not doing a good job at all, are they? ----_____ .
| A．I guess not so | B．I don’t guess | C．I don’t guess so | D．I guess not |
___is it ____has made Peter___ he is today?
| A．What; that; that | B．That; that; what | C．What; what; that | D．What; that; what |