Circus tigers, although they have been tamed, can _____ attack their trainer.
| A．unexpectedly | B．deliberately |
| C．reluctantly | D．subsequently |
To my _________，I passed the exam easily.
| A．joy | B．joyful |
| C．joyless | D．Joyfully |
The Great Wall is more than 6000 li in _________.
| A．longer | B．length |
| C．long | D．Longing |
We stood there, _________ at the _________ sight.
| A．frightened ；frightening | B．frightening; frightful |
| C．fright ；frightening | D．frightful ；fright |
The child looked _________ at his brother who was badly wounded.
| A．sadly | B．sadness |
| C．sadden | D．Sad |
_________ hard, and you will pass the exam.
| A．Study | B．Studied |
| C．To study | D．Studying |