______on ten years of observation and study, Professor Wang announces that everyone dreams every night, whether they realize it or not.
| A．Basing | B．Based | C．Been based | D．Having based |
With no one to ______ in such a frightening situation, she felt very helpless.
| A．turn on | B．turn off | C．turn around | D．turn to |
_______ 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 |
She had a computer at home, and her parents desired that she ______ all her work at home.
| A．do | B．does | C．must do | D．would do |
Many applicants stood outside the manager’s office, nervously waiting _________ for the job.
| A．to choose | B．being chosen | C．choosing | D．to be chosen |
The bank is reported in the local newspaper _____ in broad daylight yesterday.
| A．being robbed | B．having been robbed |
| C．to have been robbed | D．robbed |