I don’t know why he is late.
—Nor do I.He__________an accident.
| A．could have had | B．should have had |
| C．might have had | D．must have had |
Music _________ by the British musician attracts music lovers all over the world.
| A．to write | B．to be written | C．written | D．writing |
— Can you complete the task tomorrow?
— Sorry, it is _________, but I will try my best.
| A．beyond my power | B．in my power | C．in power | D．out of my force |
. _________ is known to all, good friends _________ happiness and value to life.
| A．It; add | B．As; add | C．It; add to | D．As; add to |
At the sight of the _________ scene, he was almost _________ to death.
| A．frightening；frightened | B．frightened；frightened |
| C．frightening；frightening | D．frightened；frightening |
The scientist knew nothing about the matter, because he was always _________ himself in his study.
| A．burying | B．devoting | C．focusing | D．concentrating |