The flu is believed________by virus that likes to reproduce in the cells inside the human nose and throat.
| A．causing | B．being caused | C．to be caused | D．to have caused |
I feel sure I ________ her somewhere before.
| A．was to meet | B．have met | C．had met | D．would meet |
—Are you a teacher?
—I ________, but now I am working in a company.
| A．is | B．am | C．was | D．had |
I ________ your last point — could you say it again?
| A．didn’t quite catch | B．don’t quite catch | C．hadn’t quite catch | D．can’t quite catch |
They won’t buy any new clothes because they ________ money to buy a new car.
| A．save | B．were saving | C．have saved | D．are saving |
I left my pen on the desk and now it’s gone; who ________ it?
| A．took | B．has taken | C．will take | D．had taken |