---Have you _____ completing the work given by your boss?
---Not yet, though I have tried to.
| A．devoted to | B．succeeded in | C．failed in | D．managed to |
Over time,__________custom of kissing developed as_______way for adults to express their love for each other.
| A．a; the | B．a; a | C．the; the | D．the; a |
If we ___ the other road ,we might have arrived here in time for the meeting.
| A．take | B．had taken | C．took | D．have taken |
Studies show that people are more_______to suffer from back problems if they always sit before computer screens for long hours.
| A．likely | B．possible | C．probable | D．sure |
______ in my life impressed me so deeply as my first visit to the Palace Museum.
| A．Anything | B．Nothing | C．Everything | D．Something |
We _______ on this project for four hours. Let’s have a rest.
| A．are working | B．have been working | C．worked | D．had worked |