—How long have you been here?
—___ the end of last year．
| A．Since | B．At | C．By | D．In |
He to paint the whole house but finished only the front .
| A．set about | B．set off | C．set out | D．set in |
All the characteristics that distinguish birds ________ other animals can be traced to prehistoric times..
| A．to | B．between | C．for | D．from |
Mother made a promise ________ I passed the exam, she would buy m e a computer..
| A．if | B．that | C．that if | D．whether |
He tried his best, but he couldn’t ________ the college entrance exams last year.
| A．get through | B．get over | C．get up | D．get away |
Because of my poor English I’m afraid I can’t make myself ____．
| A．understand | B．to understand | C．understanding | D．understood |