Professor Liu has ________ teach psychology since he came to the Central China Normal University.
| A．determination to | B．been determined to |
| C．been determining to | D．determined to |
--The weather is too cold ______ March this year.
--It was still ____ when I came here years ago.
| A．for; colder | B．in; cold | C．in; hot | D．for; hotter |
_____ in thought , he almost ran into the car in front of him .
| A．Losing | B．Having lost | C．Lost | D．To lost |
Take a taxi , ______ you'll miss your train .
| A．and | B．if | C．otherwise | D．or |
--- I ______ so busily recently that I ______ no time to help you with your math.
--- That’s OK. I can manage it by myself.
| A．have been working; have |
| B．have worked; had |
| C．am working; will have |
| D．had been working; had had |
--- Oh, dear. I forgot the air tickets.
--- You ______ something.
| A．have left | B．are always leaving |
| C．are leaving | D．always left |