The policeman came up to the lonely house with the door open, ________ there for a while and 
then entered it.
| A．stood | B．standing | C．to stand | D．having stood |
—Yang yan, are you coming with us?
—I’d love to, but something unexpected ______.
| A．was coming up | B．had come up | C．would come up | D．has come up |
The manager was concerned to hear that two of his trusted workers _____.
| A．are leaving | B．have left | C．were leaving | D．will leave |
My watch _____ at nine o’clock, but now it _____.
| A．was going; stopped | B．went; is stopping | C．was going; has stopped | D．went; stopped |
He did all he could to _______ but nobody noticed him.
| A．draw people’s attention | B．focus his attention | C．draw attention to | D．pay attention |
Many famous hospitals are competing _____ an excellent doctor, who came from the USA last week.
| A．to | B．in | C．for | D．with |