The duties of a policeman are _____ than ____ .
| A．dangerouser ; a teacher | B．more dangerous ; a teacher |
| C．greater danger ; those of a teacher | D．more dangerous ; those of a teacher |
The teacher together with the students ________ discussing Reading Skills that ________ newly published in America.
| A．are；were | B．is；were |
| C．are；was | D．is；was |
If you have a job，________yourself to it and finally you’ll succeed.
| A．do devote | B．don’t devote |
| C．devoting | D．not devoting |
Mary is the only one of the teachers who ________ a little Chinese because she is one of my friends who ________ been to China.
| A．know；have | B．knows；has |
| C．knows；have | D．know；has |
．________ surprising it is you should not know what has happened!
| A．What | B．How |
| C．That | D．It |
Not until I came home last night ________ to bed.
| A．Mum did go | B．did Mum go |
| C．went Mum | D．Mum went |