14．This doubt had been in my mind for some time, but the research still went on____some reasons.
| A．to | B．about | C．for | D．In |
Mr Wang______an article on how to improve spoken English last month, but I don’t know whether he has finished it.
| A．has written | B．wrote | C．had written | D．was writing |
You can’t guess ______ when he was admitted by Beijing University.
| A．how he was happy | B．how happy was he |
| C．how happy he was | D．he was how happy |
As teachers, we feel______our duty to teach our children to be good wherever we are.
| A．this | B．that | C．it | D．there is |
— Each of the students, working hard at their lessons, ______the book.
— So have I.
| A．is reading | B．has read | C．reading | D．reads |
After______for the job, you will be required to take a language test.
| A．being interviewed | B．interviewed | C．interviewing | D．having interviewed |