___ 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 |
Tom returned from the manager's office, __________ me that the boss wanted to fire me.
| A．having told | B．tells | C．to tell | D．telling |
__________ the task, they had to stay in the lab for another two hours.
| A．Not completing | B．Not completed |
| C．Not having completed | D．Having not completed |
The storm left, __________ a lot of damage to the city.
| A．cause | B．caused | C．had caused | D．having caused |
With weather __________ fine, we see more and more birds around us.
| A．turns | B．turning | C．is turning | D．to be turning |
—What shall we present our grandma's birthday? A jacket, a hand of flowers, a birthday cake...?
— __________. Let's buy her a birthday cake.
| A．It's my pleasure | B．That's it |
| C．That's true | D．That's right |