—When did the Greens come to China?
—They_____ China for seven years.
| A．have come to | B．have been to |
| C．have come in | D．have been in |
____ your time and think the important decision over.
| A．Take | B．Waste | C．Kill | D．Save |
______ 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 |