-- Has Nancy gone back to her home in the UK?
--Yes. She ______ here only for three days with her friends.
| A．stayed | B．had stayed |
| C．has stayed | D．was staying |
On AIDS Day, the minister of Health Department demanded that the problems _____ paid special attention to.
| A．referred to being | B．referred to be | C．refer to being | D．refer to be |
Getting your students ________ in classroom activities is vitally important.
| A．trapped | B．devoted | C．stuck | D．involved |
Mr. Tiger insisted that he _______ the money back to his boss but his boss said that he didn’t receive it.
| A．should pay | B．had paid | C．pay | D．would pay |
_______ in the leg made it impossible for him to walk to school every day.
| A．Being injured | B．Injured | C．Having injured | D．Injuring |
We were stuck at the airport because of the heavy fog, otherwise we ________ here in time for the conference.
| A．arrived | B．had arrived |
| C．would arrive | D．would have arrived |