---What _________ to the building? ---It _________ when all the people were sleeping.
| A．has happened; was broken in | B．was happening; was broken down |
| C．was happened; broke into | D．happened; was broken into |
______ a teacher, his main duty is to help the students become better learners.
| A．As | B．By | C．About | D．With |
Sorry, parking _____ here.
| A．doesn't allow | B．isn't allowed |
| C．didn't allow | D．wasn't allowed |
Can you imagine what life will be like in _____ time?
| A．10 years' | B．10 year's | C．10-years' | D．10-year |
Old people must _____.
| A．be spoken to politely | B．speak to polite |
| C．be spoken politely | D．speak polite |
Where ____ the 2010 World Expo _____?
| A．did; hold | B．was; held | C．would; be held | D．would; hold |