（）from other continents for millions of years, Australia has varieties of species which can hardly be found in other parts of the world.
A: Being separated
B: Having been separated
C: To be separated
D: To have been separated
A: Being separated
B: Having been separated
C: To be separated
D: To have been separated
举一反三
- The identical twins, ___________ so long, hugged each other and burst into tears. A: being separated B: having been separated C: having separated D: had been separated
- In no way ______ from practice. A: theory can be separated B: theory is separated C: can theory be separated D: has theory been separated
- She will not submit to ___________ from her boyfriend. A: be separated B: separate C: been separated D: being separated
- ______ from other continents for millions of years, Australia has many plants and animals not found in any other country in the world.
- Australia has always been a continent with few people mainly because ____ ___ . A: Australia is too far away fram Europe B: Australia is the least mountainous and most level of the world's continents C: Australia is separated from the rest of the world by seas D: most of the continent is hot and dry